I personally are not a professional musician, while I know some basic music theories, it's not to a level so that I can say "I'm a pianist" or "I can play piano" just because I can hit random notes on C major and F major. And I've been enjoying jazz for more than 10 years, even if some of those progressive/avant garde stuff completely go above my head.

So yeah, I can't really based others on myself since I never know anyone who also likes jazz (well, I don't have friends who are into artistic stuff in the first place), so can't really know how much non-musician people listen to jazz. And from seeing discussion on this sub and other jazz related community, I get the impression that the majority of jazz music audience are musicians to a certain extent, at least in comparison to commercial pop music.

Well, That's just some thoughts while I finished my fried noodles. Cheers.