The thing is, it's not some pure freedom of choice to consume soda. Soda is massively subsidized by government policy, and marketed aggressively by corporations

The thing is, it's not some pure freedom of choice to consume soda. Soda is massively subsidized by government policy, and marketed aggressively by corporations that make huge profits because of its addictive properties, which they carefully enhance. They spend part of those profits on lobbying to ensure that there are no countervailing forces in society, and that the subsidies remain in place. And the negative externalities of it on our health and on the environment are born by society as a whole. If anything, forces that counter-act their marketing and lobbying enhance your freedom by making it so that you are making a more-informed choice if you consume their product.