I'm a parent of two classical musicians in training, and I took cello lessons through high school. Today, I'm a jazz bassist, and a scientist by day.
I wonder if the cost and competitiveness of the training has something to do with the problem. The people who can win auditions are in fact elite musicians, and are almost exclusively from affluent families.
I enjoy the challenging music too, in the jazz genre. Given that I'm not trying to make a living at it, I'm grateful for the fact that I can play for a tiny but appreciative and loyal audience. I think there are a lot of niche genres that are sustained largely by amateurs and hobbyists.