I think the biggest issue is with image. In all genres of music, NO MATTER WHICH it may be, there is an image that tries to tag along with it, which in turn, kills a part of it's value and leads many to believe that the image taps into the true spirit of the work.
Classical holds the image of the raised chin and crackling knuckles and the genius pining away at his masterpiece. Old people, rich people, and nerds insulting and flinging ridicule as if trying to compensate for a fight they know there is no way to win. This KILLS so many potential listeners, because they are intimidated by an image which holds very little water. Genuine classical musicians are humble and open minded. How many classical pianists play a Chopin ballade and deem themselves musicians. How many FAMOUS classical musicians command extensive repertoire and still sound like brain dead idiots. Many.
Same with Jazz, and pop and rock and rap, etc. These genres, except for jazz, are more affected. They are subject to media, and image used as A SELLING POINT. Jazz is an exceptional medium for creation and self expression, and as always, communicating through music that which is otherwise noncommunicable. I've seen many Jazz pianists sit down play RANDOM jazz chords, improvise poorly and sway their bodies so fiercely that they think they're the sh*t. This is all they know, they think the image is everything It's not an insult to the genre, it shows the immaturity of those attempting to tap into the real meaning of music.
But to hear the good stuff...Truly amazing!
Classical snobbery helps nobody. Jazz snobbery (likely more rampant than classical snobbery) helps nobody. It restricts the language. The language is music. Music is not jazz chord theory, not correct voice leading in a symphony, not how many G's you got ***, not if you did it again Britney. This is all an image. We need MUSIC.