I think there's a dichotomy between the media and real life. In the media, the "ideal" woman is portrayed as flawless, a size 4/6, long glossy hair etc. Anyone who's over size 10 is deemed to be fat.
Yet in real life, obesity has become normalised. I used to be obese, then I lost weight and went down to a safe BMI and was a size 12. Everyone started saying to me that I had got "too thin" and "didnt look well". I still weighed over 10 stone (I'm only 5'5") and was a size 12. That was seen as thin/underweight by friends and colleagues. I was really shocked. I'd spent my 20s being about 9 - 9 1/2 stone and no one ever commented that I was too thin. I'm now in my 50s and society is accepting that women are much bigger than 30 years ago.
Obesity comes with a myriad of health problems. Yes, I know that some womrn claim to be 14 stone and healthy, and I'm very aware that there are unhealthy women who ae a size 10. But exceptions aside, on the whole having a BMI of 30+ means you are more likely to develop health problems.
However, acknowleding facts like these leaves you open to accusations of fat-shaming.
^THIS^
I am overweight. I went down from almost morbidly obese to almost obese.
I still have 2-3 stones to lose.
However, the number of people who are now telling me I'm thin enough (BMI 29.5) is ridiculous. I am obviously still overweight and I am pretty unhealthy.
Living in one of the unhealthiest places in the West Midlands, obese has become normal.
Whole families, teenage girls included, are morbidly obese and see nothing wrong with it.
The only time I've seen #bopo posts is in relation to obese models like Tess Halliday.
Like any subject, people tend to live in their own echo chambers these days, tend to find people who reflect their views and opinions and tend only to mix with people who support and reinforce their looks/appearance/weight/opinions/world views.