What's all this talk about entrenched points of view? As if we're talking about a political issues? Where talking about what constitutes reliable evidence for a treatment benefit.
A question for you,
@Hilda Bastian: if you read a homeopathic study of ME which reported benefits on self-reported measures within a few months after the (12 week treatment), and the study was open-label, would you accept that as evidence that homeopathy works?
If your answer is no, would any time chatting with homeopaths be likely to change your mind? I'd say it wouldn't, because you're not against homeopathy per se, you just know too much about the biases that can be introduced in open label trials. You are unlikely to change you view on this at all during the discussion. Your view is based on your understanding of bias in science.
Now would your answer be any different if the design was the same but the treatment was exercise?
If your answer is still no, then that's again because you have a strong view that blinding is important in treatment trials, and that even if a treatment
can't be blinded, we cannot just ignore the problem altogether. We need find some other way to minimise these sources of bias or alternatively, asses their impact on the outcomes. If that's your view, then I expect no amount of chat with exercise therapy providers is likely to dissuade you of that opinion, its based on your understanding of science.