I'm not sure, I just don't think that a textbook that can be used to diagnose everybody with a disease is very trustworthy. Kind of like how passing a law that can be used to arrest anybody is generally not a good idea, or something like that.
My original comment in this thread was how anyone could be diagnosed with something in the DSM, and usage of subjective methods is a major way that can happen, so it seems the goalpost didn't move at all.