> It becomes harder to find and therefore listen to music you like when every avenue of discovering music is drowned out with 1000 AI-generated songs for every 1 human-made song.

Creative expression and consumption of media are different questions. You are right about that, but that's a separate issue.

> Is it such a bad thing to want to be able to pursue your creativity full-time? For creative fields that require thousands of hours of practice to achieve results other people will enjoy, should we reserve such skilled expression only to those born wealthy enough to not need to work?

Welcome to capitalism, enjoy your stay. And if you dont like it, you can always wait for the coming times when informational work is completely automated, which means that traditional social mobility completely disappears, and capital is locked/frozen forever and we will have serfdom instead. So I would recommend you enjoy the present.