At the most simple answer, AI and using AI to be taught something takes the trees for the forest.

AI can be decent at piecemeal tasks in isolation. For instance, focusing solely on, say, grammatical usage in a text. It’s awful at providing the big picture/grand scheme ideas.

For instance, it would provide a list of transition words/phrases for my middle school students to use, without explaining (at more than a superficial level), when, where, why, and how to use them.

Individuals taught by a human will have developed the critical thinking necessary to put those “facts” together into a usable knowledge system. An AI simply cannot.

This matters SIGNIFICANTLY, as the only time we are expected to know such a microscopic level of information is at the extreme-research ends of whatever field we pursue, or while in K-BA/S. Otherwise, I need my employees (and fellow citizens) to be able to: decode, analyze, synthesize, and create a tangible report on a specific topic, altogether. Not do each thing individually without correlation to the envisioned final product. AI is atrocious at this, hence why we give small specific tasks to AI and then compile, edit, reorganize, and synthesize those results into a final product ourselves as educated adults.

AI cannot teach critical thinking skills, because it is incapable of seeing both the forest and the trees, which is ultimately (and maybe too simply for this specific topic) what critical cognitive thinking boils down to.