I skimmed the NY Times article. I gather the basic idea is the body will fight to return to its original weight through a slowing metabolism and uncontrollable urges to eat. I imagine the "fat-logic" side would simply say, "If your metabolism is slowing, you just have to eat even less!".
But if there are hormone changes, why isn't this judged to be a kind of eating disorder? No one expects an anorexic to be cured by saying to them "Just stop doing that." I suppose these debates rage over why a person is perceived to be failing. Do they have a character flaw where they can't resist temptation? Or is something out of balance in the brain where it is impossible to stop what they are doing?
It reminds me of those stories of parasites and viruses that control the minds of their hosts. The recent post about gypsy moth caterpillars talked about the virus that compels them to climb to the highest branches so their liquefying bodes will rain down on the greatest numbers of leaves to spread the virus further.
I also struggle to maintain my borderline healthy weight. I can sometimes resist snacking and over eating sweets for many weeks, but at some point a switch flips and I just stop caring and eat too much. How do I judge my own failings? Am I just not trying hard enough, or am I doomed by some chemistry I can't control. (And how close are we to slipping into a discussion about free will.)