It doesn't show it is a disease, all it shows is that eating too much and eating the wrong foods makes you fat.
The solution is to eat less and to eat more appropriate foods.
I'm really not interested in trying to convince anyone but perhaps you'd be willing to concede that, while being fat/obese isn't in itself a disease, overeating and eating for emotional reasons are signs of having made some fairly common poor choices in dealing with emotional illness and pain. Many of us humans eat for reasons other than nourishment; fear, loneliness, inability to cope with memories or certain feelings, celebration, boredom, depression, or for entertainment. Surely you've heard the term 'stuffing down our feelings.'
Overeating to the point of obesity, as with anorexia and bulimia, are responses to emotional pain, and these responses are no different than the choices that some people make to use drugs to help them cope with their emotional pain, which our world has plenty of.
And so the 'illness' of addiction to anything has been well documented.
http://en.wikipedia.org/wiki/Addictive_personality
An addictive personality refers to a particular set of personality traits that make an individual predisposed to addictions.[1]
THE ADDICTIVE PERSONALITY: COMMON TRAITS ARE FOUND
http://www.nytimes.com/1983/01/18/science/the-addictive-personality-common-traits-are-found.html
Thus your comment about making better choices about what foods to eat and what activities to participate in misses the point. The choices that were made around food by the fat/obese weren't made for the reasons of bodily nourishment, but rather to ease their pain. For whatever reason, they decided to reach for the fridge, rather than the needle, or the baseball bat.
Once an individual with this coping mechanism learns, often with much support and counselling, that they can find other methods to deal with their pain, they can begin the road back to using food as nourishment, and using other ways to help themselves cope with their emotional pain. This is then referred to as 'abstinence'...using food and making food choices for nourishment, not as an emotional crutch.
I would also like to add that the food industry's job seems to be to exploit every human weakness for tasty choices, such that there is almost no heathy food out there. Everything is processed and bastardized to the limits of imagination. There is some serious temptation out there, even for the most hardy healthy-food individuals!
http://eatthis.menshealth.com/slideshow/print-list/184612
11. Worst Espresso Drink: Starbucks Peppermint White Chocolate Mocha with Whipped Cream (venti, 20 fl oz)
660 calories, 22 g fat (15 g saturated), 95 g sugars
Sugar Equivalent: 8½ scoops Edy’s Slow Churned Rich and Creamy Coffee Ice Cream
Hopefully this will dispel any lingering fragments of the “health halo” that still exists in coffee shops—that misguided belief that espresso-based beverages can’t do much damage. In this 20-ounce cup, Starbucks manages to pack in more calories and saturated fat than two slices of deep-dish sausage and pepperoni pizza from Domino’s. That makes it the equivalent of dinner and dessert disguised as a cup of coffee. If you want a treat, look to Starbucks’ supply of sugar-free syrups; if you want a caffeine buzz, stick to the regular joe, an Americano, or a cappuccino.
Getting back to the example of China, if you don't think their population is in emotional pain, then you haven't been listening. Maybe its taken them a few decades to begin using food as comfort, but it's happening. As is the case with many other countries around the world, eg. McDonalds is now in 122 counties and still seeking new locations.
http://en.wikipedia.org/wiki/List_o...es_and_territories_with_a_McDonald.27s_outlet
Try not to be so naive about really deep human issues. There is so much more under the surface; maybe consider taking an empathic moment for those who aren't yet making the best choices for themselves. As they refer to them in any of the Anonymous literature, 'for those who still suffer.'
This is the story of a combination of weakness in human beings, caused by external forces over which they had no control (childhood emotional damage), and the exploitation by an industry that knows how to target the weakest client and make him/her their best friend.
Overeaters Anonymous
"Food was my friend."
http://www.oa.org/newcomers/how-oa-changed-my-life