Came to mind watching this Bill Maher monologue. In it, he conflates eating junk food with being overweight, and being overweight with a variety of medical conditions.
Conflating the first thing with the third sounds reasonable enough; we evolved to eat fruits and vegetables, not meat and dairy; but conflating the second with the third sounds dicey. For a pro-vegetarianism, anti-big-pharma guy, Bill seems to lend little significance to the fact that BMI was pushed by big pharma or that meat and dairy can leave you with high cholesterol even if you're underweight. How do we know that's not the cause of high cholesterol in the overweight?
He also acknowledged beauty is in the eye of the beholder... sure, many women portrayed in hentai look like they'd count as overweight by BMI standards. But then he says health is not, despite having touted anti-vax views which fly in the face of scientific consensus far more clearly, which to cap it off is in a context where any vested interest on big pharma's part in vaccines is more in the money they could make from parents not getting their kids vaccinated, hence suggesting the opposite bias from that of which they are typically accused. So for someone who's willing to defy scientific consensus once, it seems hypocritical to bitch at people who do so now. It's certainly possible for being overweight to be attractive and unhealthy; men who impregnate overweight women first know they have enough body fat to nurture a fetus during a famine even if the weight puts a strain on them, not unlike finding huge breasts attractive despite the harm on women's backs. But it's also possible for being overweight to be healthy and below-average attractiveness... for instance, if you took more than your tribe's share of the food, but it was all healthy food that gave you low cholesterol... and everyone else in the tribe was denied their share of the food because of it. If the tribes that instinctively bashed in the skulls of the overweight thereby incentivized food-sharing, and therefore outbred rival tribes, wouldn't that explain modern fat-shaming instincts without requiring the assumption that being overweight is unhealthy?
Last but not least, he compares being fat to being drunk. In many places, food that is filling but not nutritious is cheaper than food that actually is nutritious; meaning the only way to afford your daily dose of vitamins and minerals is to have a hell of a lot of calories with them. In some towns, that is unavoidable, whereas alcohol, as far as I'm aware, is avoidable everywhere.
