So much of cinema's power comes from believing that theres another human mind on the other side of the screen conversing with you. Someone who made hundereds small, big, deliberate, specific choices in every single frame.
The tragedy of AI art isn't even that it looks bad, it's that it forces you to become a skeptic. The moment you start wondering if a gesture, a certain pacing, a duration of pause was intentional or just a program hallucinating, calculating probabilities,...the immersion dies, the magic disappears.
You just had a meaningful conversation with someone.
Then you found out that person was AI.
How would you feel? You just wasted all your emotions to a robot.