Right now it's easy to say, because the AI generated stuff is so obviously bad. What if it were better than human output? What if the only way to tell was that the human sounded worse?

You're betting on AI continuing to be bad, or on humans rejecting it wholesale. While I wish humans would reject it, I'm not so optimistic.

For most people, art is just entertainment. For artists, it's a source of income.

AI can likely solve entertainment cheaper than artists can.

There is no AI in the world that can replace live AC/DC performance.