This is going to sound cynical but what you suggest doesn’t make money so there’ll never be such campaign in US unless there’s a way to make more money out of it compared to the current state of things - which is very difficult. The entire health care industry and policies in US are atrocious.
I wonder if any data exists that would indicate how much money the Healthcare industry would lose if the obesity rate dropped by X percent. Would be an interesting thing to look at.