I haven't seen any evidence that the new school lunch standards were successful in the first place. The science of nutrition is in flux, for example, all that low-fat, saturated-fat-is-the-devil garbage advice they've been forcing on us for over a generation has probably fueled an increase of Type 2 diabetes. Even low-sodium has in at least one study been shown to increase cardiac risk, not lower it. So dictating what kids eat can be a tricky thing, especially when the goalposts are always moving.
I would be interested to see the studies that indicate a diet that aims for low fat consumption and avoiding trans/saturated fats leads to the onset of type 2 diabetes. Did they find that regulating fat intake was its self the cause, or that subjects when controlling their fat intake turned to other bad eating habits, such as increasing their sugar intake ? You want to moderate your fat intake firstly because fats are very dense in calories. You want to avoid trans and saturated fats because they increase your cholesterol levels and put you at risk of cardiac disease, high cholesterol is one of the common causes of heart disease. You do not want to avoid fat altogether. The best way to approach fats are avoiding the solid fats like lard, butter and margarine.
Context is important. If you have hypertension lowering your sodium intake is advisable.
America has an obesity epidemic. I believe it is the 2nd 'fattest' country in the world next to Mexico. Bad eating habits are often developed in childhood and carried forward into adulthood. There is a childhood obesity epidemic. Children should
not be developing type-2 diabetes due to their dietary habits.
What the hell is wrong with schools encouraging proper eating habits ? Schools are meant to educate young people. Learning to live a healthy lifestyle via giving the example of healthy food is not a valid form of education ? This would be something any good Conservative would want. It will save money long term on healthcare via the children who pick up on the importance of eating well not growing up to become unnecessarily diseased from living a poor lifestyle.