Imagine having a heart attack and being rushed to a casualty hospital, would you care if the medics were Black, Jewish or overweight? get my drift? it would not cross your mind. No sane person would believe the average person goes out of their way to become heavily overweight, but like the Black person, the Jew, the Gay person, we are what we are.
Clearly, for so many losing weight is extremely difficult, the person that comes up with a 100% successful way for all people who want to lose weight, would become so rich he or she would be sending welfare parcels to Bill Gates.
So, I say to the heavily overweight person, cut yourselves some slack. People only ever notice once, and only a bigoted fool and coward, with their own fears and prejudice, would ever make any mileage out of the situation.