Peer review WAS vital for a long time. Maybe the world looks different now, maybe LLMs can find value in things better than humans. When you make an assumption it's good to think about why you do so, in this case it seems to be for historical reasons.
likewise, taking a wrecking ball to systems refined over centuries should come with some burden of proof for the positive claim that a tool can replace an institution. most times this has happened before, we've had to strengthen credentialing requirements to stop people from dying