Lots of our treatments, including ME treatments, and including everyday medical care, are scientifically plausible. That is not the same as proven or reliable. We go to medical authorities and hope they can help. In the case of ME they usually don't. There is a guesstimate that half of all medicine is wrong, and even more of psychiatry. Science is a method, not a destination. The way I consider it is that these things are working hypotheses, including my CFS diagnosis and ME diagnosis. Whether we do it ourselves, or under medical advice, we are basically the test subjects in ongoing experiments. With something as complex as ME these treatments usually fail, or fail over time.