That's the thing. As someone evaluating pull requests, should you trust the code based on its provenance, or should you trust it based on its content? Automated testing can validate code, but it can't validate people.
replyISTM the most efficient and objective solution is to invest in AI more on both sides of the fence.
In the future, that may be fine. We're not in that future yet. We're still at a place where I don't fully trust AI-only code to be as solid as code that is at least thoroughly reviewed by a knowledgeable human.
reply(Yes, I put "AI-only" and "knowledgeable" in there as weasel words. But I think that with them, it is not currently a very controversial case.)