Take U2's October as a nice example. (You mentioned Zombie, incidentally one of my favorites, the anger and frustration in there never fail to hit me, I can't listen to it too often for that reason), superficially it is a very simple set of lyrics (8 lines I think) and an even simpler set of chords. And yet: it moves me. And I doubt any AI would have come up with it or even a close approximation if it wasn't part of the input. That's why I refuse to call AI generated stuff art. It's content, not art.