The better question is, what's behind the difference in behavior?
The truth is, humans are lazy and will, by in large, only do work that they have to do.
How do you think it happens?
Your comment basically amounts to: "I've never dealt with this medical issue and don't understand anything about it. I also believe that it's easy to fix if everyone acted like me."
I seriously hope you review your thinking on this and learn more on the subject.
Have you ever considered that some people are genetically predisposed to being overweight, just like you are probably genetically predisposed to being slim? I'm not saying that's the only reason--obviously exercise and diet play a huge role--but not everyone is starting from the same baseline here.
I would guess probably the biggest reason for people being overweight in the US is the abundance of cheap and delicious food and alcohol. It's simply really easy to become overweight living in the US.
Edited to add: obviously that’s before we consider the interplay between natural selection and sexual selection.
For example, you cannot explain why people are overweight people by saying they are:
- generically stupid
- ignorant
- lazy
- self-deprecating
- biologically inferior
- weak willed
Clearly there are other more fundamental issues involved. What psychological needs and stress are involved? What environmental factors are present (or missing)? I think that to a degree you can generalize this to things like drug consumption and addiction.
I believe people have their agency and I greatly admire those who start and sustain significant health improvements of any kind. There is a reason there are so many self-help charlatans: the real key to unlocking success is complex.
Fasting has taken me from obese to overweight, not eating is the only thing that works, but when I start up again, I eat for two!
[1] - https://www.cdc.gov/media/releases/2017/p0718-diabetes-repor...
Need to treat the causes not the symptom. Magic pill to kill 25% of your weight leaves the causes behind.
Poverty and terrible work culture tend to drive it primarily. I see more fit and healthy people in well balanced jobs.
I did exactly that for years. Until I didn’t. Which happened because I saw what might happen to me if I didn’t stop it.
The only thing I can do is keep unhealthy food out of the household, which was easier when I was single. Now that I'm married, with kids, and a wife that likes to bake, it's much harder.
BUT: I get that "I find it unbelievable that people find it difficult to watch" feeling when I watch an alcoholic polish off a bottle of booze, or when I see someone with a substance abuse problem polish off a bag of an illegal substance.
Turns out that a lot of people have issues with self-control. I guess I'm lucky that my self-control problems are just food. Could be worse.
It takes a lot more willpower and self-control to stay healthy if you're in the 2nd category (Source: I'm fat and lazy).
I can absolutely relate!