60 years ago obesity in every stable country was a tiny fraction of what it is today. Are people 10-50x less disciplined today? Really? Or are there just more incentives for processed food companies to sell you their crap? Are quick dopamine hits so easily accessible that people are becoming less driven? Is mainstream society not pressuring obese people enough to change course for being unhealthy?

Yes there's WAY more distractions today, and all those factors make it harder to navigate life practicing healthy habits, but you still have agency. The natural state of the human body is to use calories. The brain alone burns an astonishing amount of calories just thinking. Also no one's force feeding you anything.

There's plenty of countries with a lower "quality of life" index that barely have obesity problems. Maybe the natural tendency of the human body is not to slowly get fat?