If you look at this year rock werchter festival in Belgium, it's ofcourse very good artists: Gorillaz, The XX, Franz Ferdinand,...
But almost only groups from the 90`s / 2000`s that could make their name when the industry was more tolerant with non-pop / blockbuster music.
I m over caricaturing ofcourse, but probably that if Gorillaz was created in 2026, Damon Albarn would post his work on a forgotten soundcloud, do some bartmitzvah during the weekend to roundup the end of the months while working as a ubereats delivery driver.
I also think the industry is pretty tolerant of more experimental/non-pop music, just that this isn't really true for the rock scene amymore. Hardcore punk, hardstyle, dubstep, hyperpop, shoegaze are all huge genres now, large enough to live off of and perform at festivals as big as coachella.
You may be right about Damon Albarn but that would just be a result of which genres have listeners who are willing to listen to smaller, non-mainstream artists. I think the biggest example of this is that mainstream rock music a la guns and roses has pretty much completely died out, while genres with smaller, more dedicated fanbases like post-rock and noise rock are still going strong as ever. I'm sure if you check your local shows (and you live in a place with reasonably large population) you will be able to find plenty of bands who completely live off their music.