Both the school and the journalist assume that their knowledge of what is healthy is reliable but in reality there is widespread disagreement about what constit

Both the school and the journalist assume that their knowledge of what is healthy is reliable but in reality there is widespread disagreement about what constitutes good nutrition. This is one of the reasons why authoritarian approaches are bad. However, it is pretty uncontroversial that banning things, especially highly sought after things, has unintended consequences.