Except that most of the code seniors review was written with intention, not just the most statistically most likely response to a given query. As a senior engineer, the kinds of mistakes that AI makes are much more bizarre then the mistakes junior engineers make

I've worked with many interns and juniors in my life and they've made very bizarre mistakes and had subtle bugs, so the difference in the kinds hasn't made much of a difference in the work I've had to do to review. Whether or not there was intention behind it didn't make a difference.

I’ve definitely seen absolutely bizarre creations from junior devs decades ago (so, well before modern AI). I can also think back to some cringey code I wrote by hand when I was a junior as well.

I mentor high-school students and watch them live write code that takes a completely bizarre path. It might technically be intentional, but that doesn’t mean it’s good or useful.