Yep. I'd say it's an order of magnitude more effort to read code you haven't written too, compared to reading code you wrote. So there is approximately zero chance the people using AI to generate code are reading it at a level where they actually understand it, or else they would lose all of their supposed productivity gains.
Yeah if people were good at reading code we wouldn't have the whole LGTM meme where the reviewer gives up as soon the PRs is bigger than 500 lines.