Serious question: Why not make toxic diet illegal or cost prohibitive? Lots of manufactured food is designed to be more addictive. Then add in constant advertising bombardment targeted at kids. Why is there up to double the sugar in US bread and soda versus Europe?
The politics of legislating diet are very fraught, let alone the implementation is incredible complicated.
Even blue state dem voters I know used to whinge about Michelle Obama and her veggies lol.