Dippy was (presumably) not charging for his "services" in pointing this fact out to her, and Dippy was (again, presumably) not trying to help her work out what was going on in her own mind, but simply trying to stop her from s5ing with his own head in her incompetence. He wasn't fraudulently impersonating a psychologist; he was defending himself with the truth.
If in doing so, she found that truth to be so overwhelming that she was in need of a psychologist, psychotherapist, or counselor, then she was free to seek out one of her own colleagues and learn how to cope with what Dippy had shown her about herself; it probably wouldn't have cost her much more than she was charging him. |