The models that make AI songs were trained on real musicians' copyrighted works, without permission.
It's kinda shitty to steal someone's works, then use them to build a machine to also steal their jobs.
Is copyright infringement stealing? Is this even copyright infringement? These philosophical questions come up often. I'm not sure I know the answers.
Bruno Mars started as an Elvis Presley impersonator (likely without his permission as he was dead at that time), can we say he stole his job?
People take ideas from other people all the time, my view is if machines do it, it isn't much of a different thing.