There is not "less music".

There are more options than there have ever been to listen to music someone made around the world from you, even in real time.

Sure. I'm absolutely certain that there has always been music... so much 15th century Bulgarian folk music that it could fill a record store, for instance. But just because that music existed doesn't mean I have access to it or even awareness of it unless I am an academic researcher that pours years of my life into it. Your indy music stuff is just like that... but I have no desire to spend the next 10 years learning to dig it out of remote corners of the world just to listen to it.

It's permanently and sociologically walled off from me in ways that I don't care to overcome. If I was interested in music discovery in 1980, how many record stores would I have had access to that I could walk into and just browse? How many of those are still around today? While radio was still pretty bad in 1980, it wasn't 12-stations-of-ClearChannel bad... I've heard those same 300 songs on an endless loop since I was a child.