There things are both a result of the part of the American body politic that espoused an obnoxiously individualistic idea of "freedom". Because some jerks don't want to pay taxes or care about other people, they argue against government things that help people -- like regulating food and encouraging healthy diets for those with means, or giving the hungry food or money to buy food.
There isn't a good argument for it, just a bad-faith argument made by mean adults who don't mind children starving or adults dying early.