When therapists don't "get" narcissistic relationships [I Want To Spread Narcissism Awareness]

I've previously watched Many videos about this topic. This video was interesting as it talks about therapists not "getting" the narc relationship. In college, we didn't have a course about solely personality disorders. That may depend on which mental health field one is majoring in. Not sure. I remember one professor saying people with personality disorders are "evil." (wow lol). Anyhow, I think it would be difficult for a therapist to recognize right off that the client/patient is in a narc relationship. So, that might be a contributing factor in some therapists taking the approaches that they do/might.