Something has to be happening in the environment that's making people fatter. The only process that is statistically successful on a population level in getting people to lose significant amount of weight is a hormone regulating drug, and it has to be kept up for the rest of the life of the fat person or they'll gain it all back. Even the extreme surgical intervention of cutting the stomach seems somewhat temporary. WTF is happening?
The future with the ozempic type drugs is interesting; now a doctor will tell you to lose weight and can give you a pill that makes it more difficult for your body to absorb extra sugar and carbs and you can lose weight, even if you are diabetic already