You can do all that, but it still remains a case of "I'm only interested in the final result".
When I read LLM generated systems (not single functions), it looks very ... alien to me. Even juniors don't put together systems that have this uncanny valley feel to it.
I suppose the best way to describe it would be to say that everything lacks coherency, and if you are one of these logical-mind people who likes things that make sense, it's not fun wading through a field of Chesterton's Fences as your f/time job.
(But still, LLMs have helped me investigate and write code that is beyond me)
They haven't done that yet[1], but they have sped up things via rubber-ducking, and for documentation (OpenSSL is documentation is very complete, very thorough, but also completely opaque).
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[1] I have a project in the far future where they will help me do that, though. It all depends on whether I can get additional financial security so I can dedicate some time to a new project :-(
Set up tooling like tests and linters and the like. Set rules. Mandate code reviews. I've been using LLMs to write tests and frequently catch it writing tests that don't actually have any valuable assertions. It only takes a minute to fix these.