Portrait painters and tunnel diggers said the same things. Impressionism, expressionism, modern art, etc weren’t obvious outcomes. The thing AI lacks, and will lack for the foreseeable future as we have a much weaker grasp on its mechanisms, is agency and at the root of that creativity. Most movie making today is a lot of mechanical craftsmanship and a lot of that will probably disappear. The bar for good will be raised dramatically. But the demand for the best won’t disappear, it’ll likely amplify as the stakes get higher.
I will wager you we will see a dramatic realignment in the sorts of work that go into production, but the demand for those skills will be so high and the value so immense that we will see a profusion of new work, better output, and more employment in the arts.