Yes so many people can’t identify a healthy weight now. So it stands to reason they can’t identify obesity either, most people a size 16 will be in the obese or overweight category, unless very tall. Sure some outliers, but as a general yard stick they likely are. And many would say oh but they are just a bit chubby,
same for low end of a healthy weight, I’ve lost count of the amount of clearly healthy weight model images posted where someone thinks they are underweight and some posters agree.
as two thirds of the population now are overweight, it’s very difficult for people to judge it on appearance. There is also the mental health impact where they don’t want to think someone is obese as they are the same size, or they don’t want to think that the model is a healthy weight, as what does it say about them.
i saw a thread a while ago, where the poster proclaimed at a size 18 she was a healthy weight, as she was just one size above average, for her average meant a healthy weight. But average is overweight to obese.
at a size 16 I was obese, toppling into the bmi 30 range, and at an 18 I was a 32 bmi, as im quite tall I’d say most people would have said at a 16 I was a bit chubby, I wasn’t.