They may have all the answers. The problem is the questions are not the correct ones. With regards to M.E. specifically they don't seem to have a clue. IMO as such they should shut up or be prosecuted for practicing "medicine" without a clue.
Some of these people harm people, deliberately, with no thought or care, for money, or self image, or something.
These days I'm not very bright, this hasn't always been the case, I still have, if not the knowledge I used to have, or the intelligence, some understanding of how things work, and more importantly in this case, how things don't/can't work. I may occasionally be wrong, but my wrongness harms no one.
These people don't understand, or appear not to understand, simple things, that any 12 year old should know about how the physical world works. When they promote things that can't possibly work, invest huge amounts of time and resources to plastering such rubbish all over the internet in an attempt to drown out the real facts, they potentially harm huge amounts of people, to make money. They are IMO criminals.
Unfortunately some people do get better, at least for a while, by luck, coincidence, placebo, whatever. Some of these people go on to effectively market these bogus treatments actually believing they work. These are the difficult ones to deal with, I have no idea how to handle them.