Well, from my simple experience with self diagnosis. I've found that to be a double edged sword. Even therapists according to Pete Walker mis-diagnose and the client might live for years thinking he's got this issue or that. That happened with me when I read Beverly Engel's book " Healing your emotional self" years ago. I diagnosed my self with terror as a one with Borderline Personality disorder. Until a few years later and when I read the enlightening Pete Walker's book: Complex PTSD. it turned out this is not the case. I don't know but accurate diagnosis can even eludes the therapist, and the client will end up with more shame and pain thinking hes got this condition or that.