Yes, I understand what you are saying. This is a subjective, experiential hobby - for the rational folks in this hobby. Ultimately, if the guys have done their homework and are willing to spend the money, it's all good. Freedom is a great thing.
As to "night and day" differences, again, it's very subjective. As an example, when I heard the Varese, it was on the wilson wamm jr xvx system. I am not a wilson guy, so I could not detect whether Varese was a musical piece, as wilsons sound very analytical and hifi to me.
However, I could detect a much, much, much lower noise floor and a banishment of digital hifi artifacts - in favor of more music coming through, compared to the vivaldi apex. I imagine dcs fans will / have SHIT IN THEIR PANTS when they hear / heard it.
So was it a "night and day" difference? I am not sure. If I was paying attention, the gap between the Vivaldi apex and Varese was "huge" sonically. But since wilson is not my thing, and the tracks demoed were not my musical favorites, it became background music. So when I was not engaged or paying attention to the music, it seemed ridiculously overpriced.
Subjectivity, preferences and the types of experiences we seek drives everything in this hobby.