Except it doesn’t ‘need’ that globally, beauty is in the eye of the beholder… Or rather ‘ear’, in this case. The listener can add/apply whatever emotions they want to a piece of music - no matter what the original artist had in mind.
So many songs are written about sorrow or happiness and millions perceive it as something completely different. Don’t discount the vast amount of instrumentals that people listen to while working, or just chilling out - not all genres are vocal driven, and AI will be huge in this domain - particularly when interactivity from the listener becomes mainstream.
AI generated art has sold for nearly half million dollars in the past, so even at a high level an somewhat intriguing demand exists.