Just like there is a difference between having your whole essay written by a LLM, or having some things corrected by the LLM, or the LLM giving you general tips that you yourself apply.

I agree.

Oh, I completely agree. In some cases, discussing a draft with your _university-appointed_ tutor before submitting your final essay is even part of the assignment (I believe Oxford/Cambridge humanities work this way), and a great learning experience, and a way for people who can't afford private tutors to get the same kind of coaching (how you get into this calibre of university in the first place notwithstanding).