Why do the meanest fakest nastiest people go in psychology majors, social work or nursing.

One of my bullies who was physically abusive used to punch me is doing a psychology major like wtf. What is she gonna do to her clients. Other mean people took social woke and nursing majors. I don’t get it. You barely have any empathy. Another bully I had also wanted to be a psychologist. I don’t get it. Why do they wanna take these?!