I would love to have access to whatever this guy is smoking, cause that is some grade-A mind rotted insanity right there. I can count on half of 1 hand the number of good PMs I've had trough my career who weren't a net negative on the projects/companies, and even they most definitely cannot build jackshit by throwing a bunch of LLM-hallucinated crap at the wall and seeing what sticks.
But sure, the devs are the ones that are going to be replaced by the clueless middle managers who only exist to waste everyone's time.