"Intellectual property" is a silly concept that only exists because under capitalism massive powerful corporations benefit if they can leverage the legal system to permeantly keep knowledge, innovation, and art behind a paywall, and people in society are dependent on monetary gain to survive.
We should, to the fullest extent of the law, make it such that proper credit is given to people who make things, but calling something "theft" when the person you're "stealing" from literally does not lose anything is asinine.
To be fair, Spotify's recommendation system is the only algorithmic content feed that I feel actually gets me the kind of stuff I want rather than just exploiting my psyche, so I wouldn't be surprised if Spotify's AI integration is likewise the only of it's kind that has real benefit.
It could also be completely useless, who knows π€·