You still have to overeat to become obese. It does imply over-use of food, and at the same time diets may have gotten worse.

Not sure why you're gone all grey there. This is the prevailing thinking in obesity research at the moment. You're more likely to be obese if you're poor than if you're rich.

You don't get as much chance to die from obesity related diseases if you've died in a war, famine, pandemic, or from coal lung or crushed to death in a factory accident.

It afflicts the poor in relatively comfortable and safe nations.