I agree it could all go a bit off-topic.(I was tempted to delete this post, as it's such a complicated topic, I've only read around the topic a little, I'm not at all sure what I think about a lot of these things, and am feeling too tired to really explain myself. It's also a bit OT).
I much prefer focusing on specifics.
My initial input was actually an attempt to stop arguing/bring people together who were arguing psychotherapy could or could not work, to say that both people could be right.
It's probably important to distinguish in discussions about psychotherapy between mainly biological conditions and mainly psychological conditions: if your mood for example is the main problem, an intervention like psychotherapy could in theory improve that and that could be sufficient.
I think what was happening was at least one person was talking about psychotherapy/CBT in terms of ME/CFS and somebody else was talking about it in general. (That's my recollection anyway)