Generative AI, in the way its being used in posters for this film, has not been with us for half a century. It's been with us for maybe two years, tops. There's nothing "practical" from a creative standpoint for a studio like A24 to be advertising a film using misleading artwork generated by AI and (possibly) cleaned-up by a human.
Like, even if you're okay with AI art, what's okay about advertising a film using shots that aren't even in the film, or even relevant? The film doesn't touch on potential AI manipulation in photojournalism, so why do these posters exist?