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If there are cultural factors at work that lead to poor nutrition and lack of exercise, well, that seems to me like a problem that needs to be discussed. Kudos to Dickerson for doing so.
There are people who can't help being fat -- that's the hand they were dealt. But most overweight people become that way for two simple reasons -- too many calories, not enough exercise. Very few who follow Buffie's regimen will end up looking like her -- they'll be fat all over, and unhealthy. They might claim to feel good about themselves, and maybe some of them do -- but they won't, on average, be around to feel good for nearly as long as those who at least TRY to stay in shape. This is such basic stuff that it seems ridiculous to point out, but evidently it's necessary.