The “evidence-based” approach comes from engineering. There, if a bridge design results in a collapsed bridge, you find a better design. It could work in the humanities, but not if researchers treat people the way they do machines. Deception is a very basic problem in this society. You can only overcome it by learning how to spot it and then not tolerating it in your relationships. It’s too widespread to do this 100%, but anything in that direction should help. If I were a therapist, I would teach my patient the basic concepts, but try to get him to cooperate even if he were skeptical. But I would work with a supervisor who would grade my sessions for technical precision and correct me if I made any errors. I would pick a therapy that had been tested and proven effective, and would seek to deliver it standardly, with no variations. This is not the current practice in the field of mental health, and its current overlords seem so bent on failure, that I doubt it ever wil be. Though the therapies I have studied are said to contribute to “mental health,” they have no real resemblance to anything I’ve ever seen done in the field of psychotherapy.