alt Hacker NewsI think the AI can not understand the situation of the student so it does not know what the student does not know. Therefore it can not guide the student through the main hurdles of learning and understanding a topic. Whereas a human tutor was once a human-student, AI never was.
I mainly use AI for learning things these days. The biggest bottleneck is always providing the machine with your context in sufficient detail that it can understand how to help you. When learning a topic it isn't always clear cut on how to do that, as you're likely missing much of the vocabulary necessary to get the AI to give you the answer you want.
AI is perfectly capable of teaching you quantum mechanics if you understand music theory. However, unless you have a full understanding of music theory, you'll need to explain to the machine what you know, and that takes trial and error that most students won't bother with.