Sunk-cost, social pressure and obligation are probably the most salient points for educational success in a classroom setting with a teacher of median-skill versus an AI trained on the same corpus.

The sad reality is that many of the most senior professors and lecturers in top universities are their for their research rather than teaching ability, and that the success of the elite institutions is somewhat self-selecting as regards their cachet and filtering done by their admissions process (i.e. Ivy League institutions do not offer athletic scholarships).