I don't want a bigger force to make the decisions for me, but I am quite happy to delegate some of my authority to the government and have it act on my behalf by requiring more accurate labeling and so forth. I eat a very healthy diet, but I don't have the time or inclination to keep up with every last additive and food manufacturing process out there. In fact, I'm happy to pay some of my taxes so other people can study that as their full-time job.
There's a huge difference between banning sugar and regulating labeling. Even Libertarian candidate Gary Johnson supports food labeling (though purists might be opposed to that).