I assume by this you have no qualms with price-gouging on epi-pens so a couple of people can get rich off of people who cannot afford this life saving product? Easy to say as long as you don't suffer from a potentially fatal allergic reaction.
Now as it turns out, a lot of fire departments purchase epi-pens for their emergency services. So now your tax dollars are going to make a couple people rich, does that make it legit to regulate the price of epi-pens?
It's easy to cherry pick a single regulation, then not consider other reasons for the regulation. If there is evidence products are marketed in such a way as to encourage over-consumption of calories, it should be within the power of the community to address the problem.