Re the PACE trial and participant's interaction with researchers: I would hazard a guess not a lot of the participants wanted to make waves by telling the therapists/researchers their "therapy" didn't work, or made them even worse. Especially after all that time invested.
When I once noted a prescription caused adverse symptoms, I was gaslighted. A negative review was very unwelcome. Years later it turned out my review was right. I was one of many with the same side effect from the drug in question. But at the time, I was "imagining" the negative effects.
It can be heavy weather to complain about therapies, drugs etc., that have the official stamp of approval.
When I once noted a prescription caused adverse symptoms, I was gaslighted. A negative review was very unwelcome. Years later it turned out my review was right. I was one of many with the same side effect from the drug in question. But at the time, I was "imagining" the negative effects.
It can be heavy weather to complain about therapies, drugs etc., that have the official stamp of approval.