I didn't find it odd at all and it seems more odd to liken an LLM to a human editor.

I'm not getting this analogy. Editors can't normally discriminate if the content itself is good (after all, the writer is the SME), but rather, only perfect its form (syntax, grammar, etc).

Well-written bullshit in perfect prose is still bullshit.

ehhhhhhh yeah but this is like hiring Reddit to do your prose editing, considering generated code is slightly worse than what you'd find on r/programming

You can believe that or not believe that without changing the implication of the previous question, which was that someone who routinely slips while writing code would be incapable of determining whether the LLM got it right. Obviously not.