As a professor, I would just say that my job is to try to get the students to learn X, Y, and Z. Not to diagnose and/or deal with their medical or emotional issues. I’m not a medical doctor or a psychiatrist. It’s not that I don’t care, but that’s not my job. There are other professionals on campus for those things. Inasmuch as this is true, it doesn’t matter what I think about why they are failing.