Why would studio executives bet on some new talent when they can generate Bruce Willis, John Depp or already put their faces on some less known actors in convincing way.
Then they make a reboot of a reboot of previous generation movies and it rolls ad infitum.
Because AI Willis can't sign autographs, do press tours, and get randomly sighted by fans. Hollywood is about more than just content, it's about cult of personality, and to have that, you need a living person.
No real fame was achieved about stupid stuff like opening restaurants or random sights in the town, I think we as society can easily live without that.
There is difference where I could make effort to fly to places where they give autographs and meet with fans but I also don't care enough. I imagine people that do care about that either live close by where they can have easy access or are weirdos.
There’s already too many movies and people get bored watching more of the same. If thanks to AI there’s a flood of cheaper mediocre movies content it could kill the remaining excitement.
but maybe a good point is that live performance may make a come back.