"LLM-assisted code review won't be a huge disruptor" is quite the prediction. Because it already is in a very big way. The take on LLMs seems incredibly out of date and out of touch with reality. (Which of course, has moved/advanced very fast the past months/year)
Did you continue reading? His argument is exactly that, like all the previous model checkers, LLM's are going to give us some bugs for a while. Then that is going to stop. His argument is not that they aren't going to find any bugs, but rather that at some point those bugs will be fixed. At which point we will continue on as usual.
I'm treading lightly after you said "did you read it" to OP, I do believe we both understand that argument isn't nearly air-tight. (i.e. it implies either humans get so good at code that bug-introduction-rate falls percipitously, or, LLMs are so awesome they write all of our code bug-free. Neither of which jives with the thesis, that LLM code review is a nothingburger long term)
The best steelman we could say is "he meant 50% of all existing bugs in all currently existing code", which is still incompatible with a time-bound on their usefulness, unless we expect the rate of new code to fall percipitously.
The steelman I'm using, is they're speaking both loosely and strongly and intend us to understand these are strong opinions, held loosely, and they care for us enough to share.