IMO this would be better in Composer's Headquarters maybe?
Anyway, I believe that AI music and art are largely positive developments.
In the arts, automation has only ever increased the value of skilled craftsmen who can "do it for real". In the late '90s, autotune was heralded as the death of the singer, but people who were actually able to sing have only become more valued by society and the highest-paying positions in the industry.
This kind of thing does not happen in blue-collar industries. Once the robot can do your job, it's over — because not so deep down, and despite a lot of the frankly borderline-communist praise that the working-class enjoy today, people do not really value menial work, but rather culture.
It is also the case that AI seeks to emulate high standards in art and music. It is not seeking to recreate some modern art nonsense or atonal gibberish but rather the expertise of John Williams and Karl Bryullov.
Even if it reaches that level, it will not be able to offer the human input and working relationship required to achieve a unified artistic vision.
We are now entering an age where your cellphone can produce a better artistic work or piece of music in seconds than people taping bananas to walls and call it "art" or the myriad zimmer clones and "it's all subjective" types, and these people will no longer be taken seriously by the masses or people with money to spend.
They will either have to start taking the craft seriously and "git gud" or go the way of the dodo.