As to your latter point, not sure why you think I think business doesn't continue on even with bad employees, of course it does and I didn't say otherwise. But that does not mean they're doing a good job, those two are orthogonal concepts.
And I'm not sure how we even got to this, the original point was that I personally as a dev can physically see PM productivity increasing with AI, even as other devs in this thread seem not to. For a competent PM, a tool that automates a detailed first draft fundamentally changes the psychology of ticket creation. If your argument is just "bad PMs will still be bad," then sure, I agree, but that doesn't really engage with how the tooling changes the workflow for everyone else.