In the past few years, “weight bias” has gained awareness as a form of discrimination. Doctors are attacked for mentioning weight, and there’s even a “don’t weigh me” card that patients can hand to medical professionals during an office visit. The card says, “If you really need my weight, please tell me why so I can give you my informed consent.” On the other side, the card says “most health conditions can be addressed without knowing my weight,” and constant weighing contributes to “weight stigma.” So far, 73,384 people have requested the cards. It’s certainly true that people with excess weight are discriminated against on many levels. Moreover, the United States and many other nations have levels of obesity not seen before, which no doubt drives the anti-weight-discrimination movements. Still, the ire of anti-weight bias and “sizism” websites rarely seems to be directed at one clear cause of adult and …