In my experience as a math/physics TA, either a student cares enough about the material to reduce the resources they rely on, or they aim to pass the class with minimum effort and will take whatever shortcuts are available. I can only see AI filling the latter niche.

When the former students ask questions, I answer most of them by pointing at the relevant passage in their book/notes, questioning their interpretation of what the book says, or giving them a push to actually problem-solve on their own. On rare occasions the material is just confusing/poorly written and I'll decide to re-interpret it for them to help. But the fundamental problems are usually with study habits or reading comprehension, not poor explanations. They need to question their habits and their interpretation of what other people say, not be spoon fed more personally-tailored questions and answers and analogies and self-help advice.

Besides asking questions to make sure I understand the situation, I mostly repeat the same ten phrases or so. Finding those ten phrases was the hard part and required a bit of ingenuity and trial-and-error.

As for the latter students, they mostly care about passing and moving on, so arguing about the merits of such a system is fairly pointless. If it gets a good enough grade on their homework, it worked.