The problem is that in a team setting, you can't control the type of "code sample" that your teammates send for review.
It's frequently the case that some teammates will request review for this kind of slop, while outsourcing all the "thinking" to the reviewer.
As a revwiewer, I now have to review much more code (LLMs absolutely increase the amount of code per hour you can put out), which is often unfiltered LLM output, so it needs more careful and thorough review.
Essentially, a careless developer with access to an LLM can now perform a cheap DoS on reviewers.