So... you're saying that a positive learning environment is better than a terrible one? The AI part is ancillary to the scenarios you set up, isn't it?

"AI is better than having the student learn in a terrible learning environment."

"A homeless alcoholic is a better language teacher than having a student learn in a classroom whilst being beaten about the head with a stick."

You're saying AI is better than a bad teacher. Maybe a bad AI is worse than a bad teacher, and maybe a good teacher is better than the best AI. I just don't know how setting up such a comparison is constructive.