I 100% agree with you though, the physical structure of (most) US cities makes this difficult if you yourself don't prioritize it, or you can't afford to.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4236245/
It's also a huge glaring actor/observer asymmetry issue, you think between the 50's and now human beings innately changed to be lazier, more prone to overconsumption? Why opt for blaming the individual multiplied by 70 million rather than looking at the conditions of their shared environment?
Subdivisions basically didn't exist in the US in the 1950s; they were only just being invented then. People lived in smaller towns and cities and walked around a lot more. Even in the 80s, kids were walking around outside a lot, without adult supervision. Now that's basically illegal in most places, so kids stay in their suburban homes all day playing video games.
And, as usual, you can compare to other countries. In other places, there's less of a car culture, people walk around a lot more, and there aren't many obese people.
I think this urge to blame people for the effects of their environment seen in the one of the parent post is an example of a very dark part of our attitude toward change. It is very easy and tempting to short circuit into ridiculing positive changes in favor of instead attempting to fix it by punishment/shaming ("People will literally rezone entire cities rather than saying we need to eat less food and workout more")
I have never met a fat person who wasn't aware they are fat. I do know two people who have failed to lose significant weight even after bariatric surgery physically restricted how much they could eat.
After even the most extreme medical intervention fails and you are still obese, what can you do? Stay inside your home forever so that thin people are not forced to look at you? Never eat a piece of cake in public? Never go shopping, never date, never dance?
Of course not. In the end the only choice is to live your life anyway, in spite of your reduced opportunities and the judgment you receive from others.
If you're brave, you might even dare to post photos of yourself on Instagram.
"Today, 7 in 10 Americans are obese or overweight, but only 36 percent think they have a weight problem. In other words, close to half the people who are overweight or obese don't think they're overweight or obese."
https://www.washingtonpost.com/news/wonk/wp/2016/12/01/nearl...
Categorizing a patient as overweight or obese is not discrimination. Dismissing their health concerns or providing lower-quality care because they are fat is. [2]
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853419/
[2] https://journalofethics.ama-assn.org/article/weight-bias-hea...
It might actually be worth telling people to eat healthily and excercise as a consistent message before we abandon the idea.