This is the crux of the problem. LLMs make me significantly faster at writing code I was mediocre or bad at. But when I use it to write code in domains I have more knowledge in I see design and correctness problems all over the place and actively fix them and it slows down my output.

Speed is seductive.

The bar isn't "this is a known good contributor". Its "this is a known good contributor working in a space they have knowledge in and has a track record of actually checking and thinking about LLM output before submitting it." It's much higher and I don't see how you can approve people on an organization-wide basis.