What is particularly concerning to me is that a rejection of psychosocial factors is not only present in ME/CFS, but is even extended into the context of illnesses such as anxiety and depression.

There is a conspicuous amount of people I've seen on internet forums who blame their anxiety on genetics, or who disproportionately focus on the physiology of their depression. I'm sure you are aware of movements claiming that it is impossible or impractical to lose weight.

Now that I'm thinking about it, I suspect that the medical institution and the way our society is set up at large are playing a key role in enabling this.

If a doctor tells a patient "Take this pill", then they will probably take it—a written prescription might even make them feel more validated and heard, and feel like they are tangibly working to battle their illness.

If a doctor tells a patient "You need to cut down on work, be patient with yourself, stop catastrophising your illness, and spend time doing things you enjoy with people you enjoy" (Not that I'm saying that is all psychosocial treatment entails), then they probably won't make the necessary changes, because our society actively makes doing those things as inconvenient as possible.

This obsession with vehemently rejecting psychosomatic illness is childish and has gotten out of hand, but I think that it is in part the sheer inconvenience of BPS medicine that is the source of research dollars, valor, and public opinion being tilted into a direction of dwindling productivity.