I've only been to two other countries, Canada, and Portugal, and the people aren't nearly as fat as Americans.
Everywhere I go, I see fat people with their walkers or in their electronic devices which wheel them around. Our culture has become good at accommodating people who centuries ago would not have survived. I should talk, earlier in our history I would have been lobotomized.
Being fat can actually add to your character though. I venerate Chris Farley as a Saint who I pay homage to, but him and John Candy would not have been such good comedians, had they not been obese. Sumo wrestling would not be as entertaining, if the wrestlers were thin.
I've done volunteer work at missions and some of these people I was feeding were so obese, I knew I wasn't doing them or God a favor by handing them out free junk food, and enabling their addiction. The lady that ran the mission was obese along with many of the missionaries.
I guess being fat can be practical. If Donald Trump turns this into a fascist country, people like me won't last long on a concentration camp diet. Obese people will have much carbohydrates stored when the body turns away from the digestive system to eat itself. It can also release an anti-aging hormone and cause euphoria when the body turns away from the digestive system to it's own carbohydrate stores for energy.
But if you are morbidly obese and poor, and you like to find clothing and underwear that fits at a thrift store, you might leave disappointed a lot.