Btw, I don't know what is attachment therapy either and I have no idea how someone could be trained in it. I believe it requires a particular emotional capacity and a non-judgemental personality on a trainee part but I have no idea even how these qualities could be measured with some standardized test for instance. The only method (highly subjective again) is that a committee of people who themselves possess these characteristics and who themselves are able to function as effective therapists interview the candidates and just recognise people with like mind. Not a manualisable and falsifiable procedure but the only one I could think of that could realistically work.

As I said, I take some psych courses from uni right now and the realisation how everything is so defined and clear to these people made me physically sick. It is good to want to understand something but just because something cannot be defined in simple terms doesn't mean it doesn't exist. I would be far more cautious about things that have been oversimplified.