More seriously, I think you need to restrict your argument to a subset of medicine, otherwise your argument is actually just "there are other area(s) of medicine that also exhibit the same issue" which is not really a counterpoint to my original comment but instead an addition to it.
So we can discount psychology as a whole but need to pick and choose medicine? Why don't we consider the various areas of psychology as well instead of just throwing out the whole book?
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.
