If you live in the U.S., you are absolutely bombarded with the idea that being overweight is bad for your health. This repetition leaves one with the idea that being overweight is the same thing as being unhealthy, something that is simply not true.
At the population level, epidemic obesity is incontrovertibly established as a clear and all-but-omnipresent danger. It is absurd to suggest otherwise. And it's those who do so -- who play ping-pong with science -- who frighten the hell out of me.