The sheer amount of pop music and its pop-ularity contradicts you a bit here. Because one can play live AI generated music just as well, hop around on the beat and prompt the viewers to put their hands in the air - a live performance is (arguably much) more than the music. But I may be wrong, maybe the pop assembly line is not the sign of commoditization I seem to see, and won't gain that much from AI support.
You are right. The pop assembly line is EXACTLY what you describe. However, that does not mean we should create new technology to make that assembly line even MORE efficient! Instead, we should work on changing and dismantling society so that it is LESS efficient.