There's an implied assumption here that developers who end up spending all their time reviewing LLM code won't lose their skills or become homicidal. :p
I'm actually curious about the "lose their skills" angle though. In the open source community it's well understood that if anything reviewing a lot of code tends to sharpen your skills.
What happens if the reader no longer has enough of that authorial instinct, their own (opinionated) independent understanding?
I think the average experience would drift away from "I thought X was the obvious way but now I see by doing Y you were avoid that other problem, cool" and towards "I don't see the LLM doing anything too unusual compared to when I ask it for things, LGTM."
Let's say you're right though, and you lose that authorial instinct. If you've got five different proposals/PRs from five different models, each one critiqued by the other four, the needs for authorial instinct diminish significantly.