I find the production and consumption of AI music to be uniquely... anti-human. You can make utilitarian arguments for most other uses of AI. For example, the code you're generating didn't exist before, and it would take serious time or money to write it. So, I get it, the economic argument is compelling enough. But music? There's basically an inexhaustible supply of human-created tracks that can be accessed for next…
I mean, I'm a professional musician - not sure if that gives me more credibility or less - but I don't feel slighted by folks listening to music made by others (whether those others are other humans, or birds, or whales, or AI).
As you point out, music has an infinite edge; one can spend a lifetime exploring either its niches or its closures and still have an infinity of each to continue discovering.
As moat identification goes, I do feel slightly secure in the sense that AI music (and the information age generally) seems to stoke a hunger for dirty traditionals played well on thick steel strings, and it's going to be a minute before robots can pick 'em like we can.