when wikipedia was initially made, many schools/teachers explicitly denied wikipedia as a source for citing in essays. And obviously, plenty of kids just plagerized wikipedia articles for their essay topics (and was easily discovered at the time).
With the advent of LLM, this sort of pseudo-learning is going to be more and more common. The unsupervised tests (like online tests, or take home assignments) cannot prevent cheating. The end result is that students would pass, but without _actually_ learning the material at all.
I personally think that perhaps the issue is not with the students, but with the student's requirement for certification post-school. Those who are genuinely interested would be able to leverage LLM to the maximum for their benefit, not just to cheat a test.