I think it's a tandem progression that more than resembles an educational process. First, you may be interested in music. You hear something that plays it better, then you want that, too. Then you start exploring. You find that there is an incredibly rich and varied body of information concerning the issue of sound reproduction, and you start to go a bit further, then spend more money or be willing to spend more money to achieve certain goals that used to be intangible.
It is possible to sharpen, hone, educate and refine the senses through use and attention. This progression goes on for years as long as an individual remains interested and curious, and nobody ever learns everything (except for the self anointed). It does require the initiative to pursue the exploration.
Most of the audiophiles that I have run across are cultivated in a manner that is just lost on the regular body of mankind, just because they have pursued their special interest for so many years.
Most of what audiophiles spend their money on is refinement along the lines of the tastes that they have developed.
A lot of exotic audio products do, in fact, give you something for the money, but you have to be prepared to appreciate it first. In that sense, certain products are probably only suitable to audiophiles at certain stages of their journey and the audio products may do certain kinds of things that some audiophiles may not have appreciated earlier. That certainly seems to be the case with me, and one of the reasons that I stick with the hobby is that it continues to open new realms of appreciation that I never even thought I was capable of.
It is politically incorrect to talk about aptitude, but not all audiophiles have the same ability to hear and not all audiophiles hear the same thing, just like not everybody has the same visual ability to perceive dimensions or are color blind. Also, different individuals may just process the raw data in different ways that are based on brain chemistry.
Also, different audiophiles will have a different kind of psychological attachment to audio. Some like order, some like emotion, some like dynamics, some like tone and transition.
Unfortunately, on audio boards, there are a lot of different people with different perception capabilities and psychological reactions talking about stuff as if it is all the same thing to everybody.