The fat is arguably the only fixable thing, or at least the cheapest. You can't "just stop eating so much" and fix a wonky nose or stick out teeth.
Calories aren't magic and hard to fathom.
Normalizing being overweight is going to kill a lot of people early.
On the other hand these figures are wildly different among humans with similar genetic profiles in other countries, and among humans of the same country 1, 2 or 3 generations ago. In other words: it's not our genetic disposition that's making us fat, it really is our behaviour. And yes it's behaviour in a different food market, but it's behaviour nonetheless.
My parents for example simply as a rule do not buy much processed food and they've always had a normal weight, never dieted, never made any effort apart from eating 'normal' like they were taught or taught themselves. For them a normal diet is as normal as putting on clothes in the morning.
It really is absurdly simple to just buy many kinds of vegetables and eat them with little or no prep. It's really easy to choose to eat lentils. It's really easy to read labels. It's easy to apply the rule to not use sugar in a recipe. It's really easy to make your own salad, I had 'salad making duty' as a kid for the first 20 years of my life or so, we had a salad everyday (we grew up on welfare btw if anyone wants to make the healthy = expensive pricing argument, it's not true). It's really not that hard to eat healthy, in fact it's easier than ever. My grandparents had to visit 10 different small stores where I can go to one supermarket, they had to buy anything fresh constantly for lack of refrigeration where I can store many foods for a long time, they spent a large chunk of their income on food whereas staple foods for me are much cheaper etc etc.
That having been said, both my parents have had quite a bit of dental work as they aged, despite taking good care of their teeth.
[0] https://en.wikipedia.org/wiki/Obesity_in_the_United_States#/...
For breakfast, I usually have oatmeal cooked with soy milk, with a banana chopped in, sweetened with honey. It's unreasonably good, super easy, very filling, healthy, and dirt cheap - probably less than 50 cents per breakfast.
A plate of sliced apples, avocados, whole wheat toast (ideally good specialty bread from a bakery), baby carrots, cheese, and pickled vegetables also makes for tasty, filling, easy, cheap meal.
I've always strongly disagreed with the notion that healthy food is prohibitively expensive. A quick trip to any grocery store proves that eating healthily is cheaper than eating a bunch of processed food, and I've found that you don't even have to put that much effort into cooking to get something that ticks all the boxes.
I can only conclude that most people are some combination of very lazy when it comes to cooking and ignorant about what's possible.
