Doing things this way can only work out if there is a simple solution. As far as I know, this almost never happens in medicine. It should have been expected here, though, because others have already done it and found none. So it was entirely useless. It's just not any worse than most of what has come out of medicine. It becomes tricky because there are so many people who do recover from those syndromes, and we just don't know why. This is very different from, say, type 1 diabetes, from which no one recovered before insulin.
When it comes to clinical trials, outside of surgeries, there are drug trials, and there's the rest. The rest is frankly universally appalling and should not be done at all. It's really odd how because of a shady history and a screwed up economic model, pharmaceutical trials and drugs in general have gotten an undeserved bad reputation, something undesirable. As if simple solutions are just better by virtue of being simple. As if willpower curing something is superior to working out the problem and fixing it. Beliefs are wild.
Frankly, medicine should mostly stick to drugs and surgeries. The rest, lifestyle and behavioral stuff, has some uses, but only as preventives. Once the harm is done, once a person is ill, it has never offered a damn thing of value. And one thing LC has proven beyond all possible doubt, it's that there are no simple solutions, at all. None. Taking it might be simple, nothing simpler than taking a pill or an injection, but figuring it out is always extremely hard.