I think _maybe_ there's an uncanny valley problem (and it may vary person to person). I found Stable Diffusion 1.5's output quite _bad_, say, but not as, I dunno, objectionable and wrong-looking as current models.

Video has always been a complete mess, remains a complete mess, I don't see any real path towards it not being a complete mess. It is, in fairness, a _much_ harder problem.