I always use AI to understand big diffs.
And you can always reject a PR, bro with "I don't understand it to approve it. Maybe make it smaller or documents it better?" Etc
I've had code approvers who gave me tons of crap, even over smaller edits. You too can be that kind of reviewer!
Personally, one thing I like about Claude is that before, specifications kept changing through verbal explanations. Now, with Claude, everything is communicated in writing, so there's no room for shifting blame.
Does this kind of difference vary depending on the engineering organization?