Why is it that diet woos just automatically assume we're in favor of, or in league with the fast food industry?
Oh, wait, that's right: They're too scared and immature to deal with a complex, nuanced, and uncertain world, thus they make up a black-and-white fantasy world where anyone who isn't for them is against them. "Natural" versus "artificial", "poison" versus "panacea", "Mom & Pop (Inc.)" versus "The corporations", "alternative" versus "conventional", "Republicans" versus "Democrats", and so on.
They're so used to living in that false dichotomy fantasy that they can't grasp that there are often more than two sides to anything. They can't grasp the idea that someone could be in favor of broccoli and other healthful foods and NOT support their quack's crazy diet that just coincidentally happens to include broccoli for mystical, magical reasons.
If you reject vitalistic, naturalistic (fallacy), or astrological reasons to eat broccoli, that means you reject broccoli outright. It never occurs to them that there would be scientific reasons for it being healthful, as well as scientific reasons for avoiding an excess of fast food.
Hell, most of the ones I've met treat the act of splurging on one order of batter-fried food as if it would undo a lifetime of healthy living: Black or white, no grays, no colors, no moderation.