Quite agreed. Granted, I come from the world of analog music made on alcohol powered instruments. But in my circle, the vast majority of musicians are delighted with finding non-commercial outlets for their musical interests. This includes some people who are quite skilled, and a few who have music degrees.

Possibilities include: Playing in church (a huge portion of both amateur and commercial music is religious), entertaining oneself at home, jamming with friends, exploring and even performing esoteric music that can't be commercially viable. Even many otherwise successful professional musicians have noncommercial side projects that need volunteers. For instance if someone is willing to compose something new, or dig up something interesting and weird, I'm willing to chip in and help them try it out, just for the spirit of adventure. I'm satisfied to perform for just a small handful of people who share similar interests from the audience side.

It's not all that different than people who are into extreme sports, cooking, etc., without any expectations of ever being competitive at it.