There probably is a genetic component to obesity, but that is only a thin sliver of the problem. People 200 years ago had indistinguishable genetics from today

There probably is a genetic component to obesity, but that is only a thin sliver of the problem. People 200 years ago had indistinguishable genetics from today yet obesity was rare enough that it was a curiosity. Something has changed in the last 200 years and the list of suspects is basically down to diet and/or exercise. I feel sympathy for nicotine addicts, just as I do for the obese. It's hard to pin down exactly how, but society (meaning some combination of their parents, peers, education, and government) has failed them. Focus on genetic components to obesity isn't technically wrong, but it doesn't help anybody get better.