And who is going to be interested in those randomly generated "famous" people? Who is going to pay to see movies with them in it? Who wants to hear music made by something else than a human person? I'd guess it's not very many, and for those who do, it's the novelty factor that intrigues them, which will be over at some point.
Replacing humans with algorithms in the arts is just the next wet dream of predatory tech bros. How much those are in touch with reality and humans is symbolised nicely by Zuck's conviction that you can just replace human relationships with statistical token generation and everything will be hunky-dory.
Just look at how much of the movie, music, literature, etc. business is about interviews, fandoms, meet and greets, concerts, festivals, award shows, signed merch, readings, etc. etc. to get an idea of how unimportant people really think the humans behind the art they enjoy are.