You finish a draft, export PDFs, and hand scenes to a board artist or an image tool. By the time panels return, you have already cut a subplot and renamed a location. Now every frame is a negotiation instead of a plan.
Generic AI image runs give you pretty stills with wrong wardrobe, wrong room geography, and no scene numbers. You spend nights relabeling JPEGs instead of rehearsing tone with collaborators.
When boards drift from the screenplay, preproduction meetings become arguments about which version is true. AI video tools inherit that confusion and amplify it frame by frame.