People do not die of “obesity.” Some fat people die from complications of what are commonly known as “obesity-related diseases,” like heart disease and diabetes, but those diseases have only been shown to be correlated with fat, not caused by fat. (Which is why thin people have them, too.) So it’s not even accurate to assert that obesity kills indirectly.
And speaking of correlation, an explanation of causation vs correlation at The New York Times makes use of a correlation between ads for junk food and fatness:
The problem is that their policy recommendations rest on a crucial but unjustified assumption: that any link between obesity and advertising occurs because more advertising causes higher rates of obesity. But the study at hand showed only an association: people living in areas with more food ads were more likely to be obese than people living in areas with fewer food ads. […] In fact, it is easy to imagine how the causation could run the opposite way (something the article did not mention): If food vendors believe obese people are more likely than non-obese people to buy their products, they will place more ads in areas where obese people already live. […]
This is not an arcane statistical point or a mere technical criticism of one academic article. Too often, relationships that are far from being understood are assumed to reflect a particular, strong causal connection, leading to no end of regulatory mistakes.
I missed the husband who loved me no matter what, not the new anti-fat crusader he had changed into. But he felt the same way: he’d fallen in love with a plump-but-not-fat woman who wanted to be thin, and now he had a fat wife who’d “given up on herself.” And Ihad given up: given up on dieting, given up on the idea that my body needed to be fixed.I already wished I hadn’t spent so many years beating myself up for being fat; I wasn’t going to stay in a marriage where my husband did it for me.