This is just one action in a coming conflict. It will be interesting to see how this shakes out. Does the record industry win and digital likenesses become outlawed, even taboo? Or does voice, appearance etc just become another sets of rights that musicians will have to negotiate during a record deal?
The only advantage corporations could have had came from having the money to throw at extremely high quality training data. The fact that they cheaped out and just used whatever they could find on the internet (or paid a vendor, who just used AI to generate AI training data) has definitely contributed to the lack of any differentiating advantage.