Yes, because I personally use them for outlines and to get specific directions for professors that don’t provide context for assignments.

Yes, they should research how it actually benefits students and not in a way they think we use it for like plagiarism and things.

Yes, it can. I witnessed it on Snapchat AI. 
It does give biased answers and sometimes racist answers. So I think they should be careful on how they use AI, but if it is for something more broad, then it should be fine.