Well, I dunno about that... that might be snobbery :D
I take your point... jazz is one of those things where that interplay is super important and can be enjoyable to see.
Also, I really enjoy playing in a string band / jam band. Essentially it's jazz, but with bluegrass instruments. But then, it's not clearly not "Jazz".
A lot of the musicians I know who are super talented don't like a jam. They want something totally un-jazz -like... they what Joseph Haydn, et cetera. In that realm, there is a whole lot of interplay between the musicians that is even subtler than what you get with jazz.
As a musician or as a listener (and, this is even more true for the better musicians that I know), I feel like there is a lot of road to explore outside of jazz even just in terms of the interplay between musicians.