Exactly. There is a ton of research out there nowadays which proves that the problem with rising obesity does not come down to individual fault or greediness. The whole blame people for their own demise doesn't cut it.
There are people out there who want to stop smoking for example but they can't because it's addictive. It's addictive because cigarettes are made to be addictive rather than the person who smokes is somehow weak-willed or whatever.
Everything we eat nowadays is the same, it's made to be as addictive as possible so that we'll continue to eat and buy it. Avoiding that stuff is difficult, it's even more difficult when you have to trade off convenience too.
Humans are hunter-gatherers, our brains are not wired to reject food and calories which is why dieting through calorie restriction is extremely difficult. It's only within the last 100 years that food has actually become so readily available so is it any wonder we're all getting fatter?