Because he is a psychologist, and Girardian psychology is not necessarily healthy. Being aware of being a copy isn’t a solution to being a copier. It can be maddening.
“Isn’t healthy” what does that have to do with science and understanding psychology? There’s no way that it “isn’t healthy” and if that’s how you see it you’re probably projecting you’re own problems onto it. Plenty of literature out there on it.