I hear you. Some people just don't realize how hard it can be to "just lose weight."
I look at my wife, who's overweight, and her trajectory went as follows:
Always a "shapely" woman, and tall, so even when she was at her smallest as an adult, she'd be close to or just over her "ideal" weight as prescribed by the medical community (personally, those things are way off for women, if you ask me).
From there, as she aged, she experienced the usual "middle-aged spread," not from having kids, but from eating too much and exercising too little. Still kept her shape, she just expanded all over. At that point, "voluptuous" would be a good word, built kind of like Sophia Loren or Marilyn Monroe - that ain't bragging, as nowadays, that body type is considered way too fat by a lot of people.
Then, her health caught up with her. Myositis meant that exercise (which she didn't like anyway) was very limited for her, and the double-whammy of the drugs to control it causing weight gain didn't help. She put on more and more weight, lost a lot when she had her stroke, and as soon as she recovered from that, put it right back on again.
Her health markers, like BP and cholesterol and heart rate - she's got numbers that would make an Olympic athlete jealous, and that's no exaggeration. But, according to the guidance, she obese.
The side-effects of her stroke make exercise difficult, she likes her food and drink, and with her numbers the way they are, she's not terribly motivated to shed a whole lot of weight, and I don't blame her, as I like the good life as well, but if I get over 200lbs, my type 2 kicks in. So I have to watch it.
The thing that gets me, though, is a lot of the people over here who tout personal responsibility as far as weight/health, and who are a-ok with denying vaccines, organ transplants, and health care in general to "people who don't deserve it," are the very same people who gripe about national healthcare and how it'll lead to rationing services and "death panels." Hey, they're already wishing they could ration a vaccine, so it turns out, they've found the death panel, and it is them.