sure - you can suggest that Taylor is the product of branding/marketing. its cynical and somewhat true. but aside from that, she's an artist. in the deepest meaning of the word.
people are not going to resonate with a generative ai. instead - people will continue to resonate with actual art and artists expressing actual feelings
They _want_ that. But they rarely have that. I argue most if not all music artists in particular, are "fake" already, in the sense that, like you say, branding+marketing, and scripted stunts and controversies, etc. People are already fooled by this in today's age. I think there might be pushback, but I think in the end people will accept/be fooled by ai generated artists.
really though? Look at Britney Spears or Shia LaBeouf. They have very "authentic" personalities, but society rejects them.
Then you have people like Taylor Swift, Billie Eilish, or Johnny Depp paying for branding agencies and people love them.