Earlier quoted context omitted.
This is backed up by medical knowledge. It has been repeatedly shown that metabolism varies very little between people when corrected for body mass. What does vary considerably is appetite, and this is the major contributor to body weight.
Do not say 'backed up by medical knowledge' unless you plan on citing sources. I don't have much time right now, but I did find a good starting point: http://www.ajcn.org/content/53/6/1561S.abstract "In this regard, the proneness to store energy primarily as fat or as lean tissue is a major determinant of the response to a caloric surplus." Also: http://www.nature.com/oby/journal/v8/n7/abs/oby200063a.html Talks about…
So there is a backlash against that. Thankfully. And along the way, in the push back, facts may get lost. Fact's that really, in the context of war, were not helpful.
And now humanity's leading edge seems to be becoming comfortable with that fact we are all different and actually kind of the same and are accommodating of wonderful multiplicity.
Whilst watching the shadow aspects of our egos, in case they come out to grandstand.