I'm far from an expert and what I'm about to say is mostly speculation, but it's first hand and may provide some insight.
Obesity is such an issue that it is ignored. A lot of times if your friend is doing something unhealthy that will potentially kill them then it is your duty as a friend to bring it up (ex. Alcoholism, smoking, etc.) However the moment obesity is mentioned you're being a bully. People just don't talk about it. Everyone knows it's a problem but so what?
Very simply it's a forbidden topic on an individual level. Until that changes, the obesity rates won't change either.
I'm far from an expert and what I'm about to say is mostly speculation, but it's first hand and may provide some insight.
Obesity is such an issue that it is ignored. A lot of times if your friend is doing something unhealthy that will potentially kill them then it is your duty as a friend to bring it up (ex. Alcoholism, smoking, etc.) However the moment obesity is mentioned you're being a bully. People just don't talk about it. Everyone knows it's a problem but so what?
Very simply it's a forbidden topic on an individual level. Until that changes, the obesity rates won't change either.