All of the most popular music of the '30s and '40s were deeply informed by jazz.
Limitations, be they practical or arbitrary, force artists to dig more deeply instead of settling for easy answers.
A play is not a play until it's performed, and unless it's a one-person play that is acted, directed and designed by the author, many other people will be deeply involved in the complicated process that leads to its performance.
I believe deeply that jazz is still a very vital music that has much to say, not just to eggheads, or whatever the musical equivalent of an egghead is, but to ordinary people.