code review can be almost as much effort as writing the code, especially when the code is not up to the expectations of the reviewer. this is fine, because you want two people (the original author, and the reviewer) on the code.

when reviewing AI code, not only will the effort needed by the reviewer increase, you also lose the second person (the author) looking at the code, because AI can't do that. it can produce code but not reason about or reflect on it like humans can.