The students are not expected to understand the perils of AI, they are expected to follow the policies the teacher gave them. And the policies were very clear: they can use AI for inspiration and web search, but they cannot use it to write text to be submitted.

What you are describing might make sense for "ChatGPT class", but that wasn't it, that was AP History.

(And that's how schools work in general: in real life, no one integrates matrixes by hand; and yet calculus classes do not teach CAS systems or their perils)