I care deeply. It is not single-handedly going to destroy humanity. However, we are clearly on a course where people are more isolated, less challenged, less social, and very very very unhappy. Music is one of those things that can really bring people together. If we flood the zone with AI music (or any other art form) we will slowly edge out the humans who are doing that. That is less new music. Less chances to come together. Less chances to dance together. It's a death by a thousand cuts. I, and many others, think it's worth fighting for because we want others to have the amazing experiences we're having.
Every generation has a new baseline. The younger generation will not be able to imagine having anything other than doctors and psychologists in the phone, and they are content with it because it's all they know. Social media might be all the social connection they have, and that will be the best thing where they will have the best experiences, they won't know another baseline. Eventually maybe the best experiences will be had with digital companions, etc.
The only losers here are old or bitter people who have tied up their worldview into their own time and cannot see or comprehend that the world has moved on with a different bound for the experiences and expectations.