All of the best educational experiences I've had in high school and college came from a passionate teacher that conveyed excitement to the students. Or (especially in college-level philosophy courses) they were small discussion groups that went on for hours. Neither of these things is going to be replicated by talking to a chatbot and most of these applications are just further extensions of a (in my opinion) broken industrial educational model.
That aside, I do think LLMs could be useful as a supplementary tutor, especially when your teacher isn't up to par.