I think your right on target ,the unfortunate truth is it's at the very heart of our medical institutions and training that is passed on from instructors to trainees.

There are only so many ways an engine can go bad or be fixed so auto or diesel mechanics know how to fix most problems (or they know who specializes in X and goes to them for advice ) our bodies are very complex but not nearly as complex as our minds .

Go back to WW 1 and how Veterans with PTSD were treated follow all its names from "shell shock,hysteria & battle fatigue" on up , it's really only the last 30 years that that anybody really figured out live through horrific experiences that's the end result ,it doesn't take war to have PTSD . Now for all intents and purposes what goes on in our brain bucket is out of reach ,sealed at the factory ? Then consider how long we have had x ray,cat scan ,MRI, and in the last 3 years they discovered a new organ in our body , or in the last 3 years a new MRI technique was discovered that revealed that psychosomatic was B'S gap in knowledge ,we have direct pathways from our brain to all of out major organs that are just being discovered exist that's why the comment "it's all in your head" is dead because nothing is all in your head .

Psychology & Psychiatry are light years ahead of where we used to be ,unfortunately that's still infancy ,and alot of it has to do with bias and nobody looking in the right place , our quiver of arrows( treatments) is remarkably empty , they have limited number of medications they pour down our throats ,and various forms of therapy ,if you don't respond to those " treatment resistant X" becomes your label .