I fear it because when it codes I have to think twice hard to find out what it wanted to do

I don't fear AI, I fear Juniors using AI.

It feels like it completely messes up my current experience and heuristics to judge a junior's skills from their output, and what expectations I have for their skills and growth from that to then not be a "Junior".

I don't want to end up having to treat all their output with the same fine-toothed comb forever more.

And I'm trying not to be negative about the current crop of AI's effect on learning, but I certainly feel like I remember a lot less if I just read, even extremely thoroughly, compared to directly writing or typing the output myself. Though that's probably the sort of thing you can only ever look back in retrospect to really know either way.

I find that the people who use AI the most should be using it the least. Non tech people and juniors trying to program. And so on