Yes, and (some near-future) AI is also more patient and better at multitasking than a reasonable human. It can make a change, submit for full fuzzing, and if there's a problem it can continue with the saved context it had when making the change. It can work on 100s of such changes in parallel, while a human trying to do this would mix up the reasons for the change with all the other changes they'd done by the time the fuzzing result came back.

LLMs are worse at many things than human programmers, so you have to try to compensate by leveraging the things they're better at. Don't give up with "they're bad at such and such" until you've tried using their strengths.