If one takes all the styles in jazz harmonically from the earliest beginnings to the latest experiments, he still has a rather limited scope when compared to the rest of music in the world.
If people have to put labels on me, I'd prefer the first label to be human being, the second label to be pacifist, and the third to be folk singer.
It costs so much to promote something these days that almost always safety is the preferred option, reference back to things which have been successful in the past. Also, people are simply not given the time to develop and find themselves and their audience as we were.