It is we who do not consciously know how to call up that information so we can do it at will. Scientific inspiration/instinct I think its called.
Don't get me wrong, I find weight and proper weight loss/ gain complex, that's because I don't know how to achieve it, i.e., I don't know how to extend the body's ability to shed/ gain weight at will as it does virtually every single day of our lives, to a conscious decision.
Luckily, we do know something, how not to do it, guess what though? We cannot accept it! Why?
This approach has overcomplicated it, really if it wasn't for that, we'd just be in the dark. Wait a minute, is that why? We are terrified of the void!
Having invested so heavily in being so sure that we know, we cannot mentally cope with the fact that we don't actually know very much, okay, correction above. Poor us, face has got to be saved. Despair has got to be kept at bay. Imagine people being told nothing can be done for what they weight. So even things that don't work will do, if we just pretend they do. The thing is to keep hope alive, if nothing else.
This means it will be even more complicated than it could or should be, because apparently its moral.WTH! Yeah, clearly that is bull, so you have to ask the obesity industry why it must happen a certain way, rather than the best way. That's of course assuming those in the know think the same way behind closed doors.
Luckily no one cares about those people fat and thin who are suffering or dying because we don't know how to manipulate weight up as well as down. Because guess what? How useful is expending energy to lose weight, the really fat who also struggle with mobility and the very thin, dying because they can't keep weight on to live another day?
Presumably the latter can keep still and live and eat fast food ( nobody can resist, its 'addictive') even though lack of appetite is usually implicated in why they are fading away.
Thing is if they are able to reverse weight successfully to thinness and keep it there, by wasting energy, they will have discovered another way by dint of that fact. Because I cannot see how that route can pay off, without some *underlying change in metabolism preceding it, which would render that approach optional anyway.
* I'll bet that's the 'secret' of those bodies that 'keep weight off'.