> Even if we assume LLMs would consistently generate good enough quality code, code submitted by someone untrusted would still need detailed review for many reasons - so even in that case it would like be faster for the maintainers to just use the tools themselves, rather than reviewing someone else's use of the same tools.

Wouldn't an agent run by a maintainer require the same scrutiny? An agent is imo "someone else" and not a trusted maintainer.