Another EE here, though I didn't pursue a career of it. It was mid 90's, computers were booming, I jumped to IT sector, then management then management in general and now I'm lightyears away in terms of profession, but the basic education is still there. Also what is there, is not only the university / college education on EE, but general problem detection and solving mindset that comes from early childhood that directs the person to the engineering field.
What You write about is valid not only for WBF, not only for internet forums in general, but our modern life in general. One side is pseudoscience, one side is people's egos, one side is it is a very subjective hobby and I guess there are few more sides to the story that I forgot to mention and all my following statements will be falsified through one of them :]] But one side I won't forget to mention is declining quality of education, both family (cultural) and academic education. People don't know the basics of problem assessment, step by step solution searching, and adequate application of solution. People also lack the basic notion of discussing / communicating. Communication, but more importantly discussion shall be a two-way interaction but nowadays people tend to listen to (or read their words online) just to pick up a few key words / points, and don't listen / read actively, they are just thinking of their next talk. Sometimes waiting impatiently their turn, most times not waiting, just cutting in and start talking. This is a problem I have while communicating, I listen actively, when other person's talk ends, I digest their ideas, form my ideas and start talking. Also, there is no patience anymore, anything and everything shall be short / quick, or dead. Most times, with most people, the duration I am digesting other statements and forming my ideas are wasted time, if it's two people communication the subject fades away, the other party jumps away to another subject, or if it more than two people, someone (not actively listening to the former speaker) jumps in and before I form my ideas and my sentences, the subject is a new one, what I was about to say are now old story. Just as I know (not scientifically though, I'm also good at making up scientific sounding data) more than 90 % of people reading this post of mine, will 'read' half of it, and skip through the other half, because it's too long, and talking about things they don't like to hear / read.
Also another problem is whataboutism (although not perfectly fitting in the recent discussion as it is, closest explanation is whataboutism). At times there are more than one sides of the subject being discussed (most of the time), one person states some argument, other party answers with another relevant looking but irrelevant side that supports their claim. And this vicious circle goes on and on.
The problem is where to draw the line. Since not being an industry professional, just a consumer, I have the luxury of throwing my two cents in, turning and waking away, which You don't have. What people miss is that the hardcore engineers, have a sense of duty against the society, as doctors have. Like when a doctor can't stand when people talk ... against vaccines, an engineer (of any discipline) feels the urge to correct the scientific misunderstanding that exists in front of them, that's an itch to them.
Yes, not every person is not supposed to be equipped with scientific thinking and understanding. Even there are people switching to education and career routes that they won't need to deal with math anymore. Yes it is normal that people have their opinions, especially on the very subjective areas (as HiFi). Yes hearing (or more accurately perception by brain of what is heard) is ultra subjective and having read many books of psycho-acoustics, hearing and brain, I know how deceiving it can be, how much perception is connected to anticipation. But like You, I am confused when people regret basic scientific fact by subjective perception.
The thing is, (and especially for WBF level of HiFi system values) even if people may have gotten into this hobby long ago and stayed humble for a long time, going into the higher-end area comes with a good amount of financial wealth and that comes with a good amount of career success. (Almost) Nobody would buy a 300K High-End HiFi system before having bought their own house, placed a good retirement plan aside and bought their significant other (at least) a car of their own :]] So the people You are discussing with (especially on WBF) are successful people. For most, it has been a long time any person has told them they are wrong, or throughout their life, they have proven wrong all the people telling them they are wrong. Most are the smartest person in every room they enter and that ego pumps and piles up through their lives.
Even without noticing it, You and I might be doing something similar to our doctor, car technician, gardener, plumber.. I use car analogy very much for HiFi, and it suits very good to many cases. Owning a HiFi system is like owning a car. More money, better one. After some point, the diminishing returns skyrockets. At some point one has to choose and switch to one no matter how much money spent, because both can not exist under one hood, or have to have one of both. As in the example of having an SUV and a sports car. But when You say "an SUV is heavier than a sports car in weight" and other person answers "while driving I feel my sports car heavier" that is where the problem starts. Even sometimes some people are "I feel like my SUV goes faster than Your sports car, and You can't make me believe otherwise because that's how I feel".
Sometimes I'm amazed how all this hearing, music, recording and reproducing sound, HiFi thing goes. We hear "one single" waveform and from inside that waveform We assort different ingredients. It is like eating a dish and assorting the spices in it. Seems some kind of magical, but also so ordinary that We all do it in many forms in our daily lives. Not everyone has to be a gourmet, yes every person can have a taste that they like or not. If an audiophile with a good ear is the equivalent of gourmet, the technical person in production is the chef in the kitchen. Stating I have a wonderful taste palate so I know which ingredients will go better in this dish (i.e. cooking) better than the chef is not the correct statement. Or to stick to the car example, We all drive our cars (We believe better than anyone on the road, especially that old lady), We can change the oil, change the tires (if We want to) but when there is a clucking sound coming from the engine, most of us go to the car technician. I believe the thing is to know when the car tech says "You shall switch to these tires, they will run with less noise", the right answer (after actively listening to them) would be "if it's not safety related, I prefer these" but not "no these tires are the best ever, I know better than You, You know nothing about cars". And be wise enough when the tech says "You shouldn't use these tires because they are safety threatening"
On another note, that SET + Horns vs. rest of the world kind of attitude and any and all kinds of threads, even the most remotely related ones turning into one on the subject is the biggest down side of WBF. Many people just read through forums, try to sort out valuable information from the subject and thread hijacks, sometimes loose hope and quit reading or skip the one bit of useful and valuable information while jumping through pages of non contributing posts. But hey, this is a free of charge online forum, and that kind of forum content is as old as internet is.