This thinking of normalizing obesity is one of those downsides though of this same social progress. There are all these 'rights' movements for obese people, which seem to get much more pull than cigarette versions did.
A few people really don't have any control over their body weight, but most do. Making smokers move to the "circle of shame" smoking zone to smoke helps (but it also creates a sub-culture). I hope education & social systems will help, it's harder to see blow-back from the non-obese about how obese people impact their health, the smell of their clothes & workplace etc, even if they do actually drive up healthcare costs to socieity. In no case are we likely to see all those who profited from cigarettes or addictive chemicals for foodstuffs be forced to join the obese in any circle of shame.
I'm rambling, which is a good sign that I've got too much on my mind. I'm going to step back again for a week or so.