I don't get how your example supports your point that they could not inact & enforce a regulation that states for electronic cigarettes, sealed carts will be the only delivery option. Smokeable nicotine products (cigs, etc) as well as smokeless are in a physical encasement that could be easly argued makes it more "safe" for accidental use. Buying a 50ml bottle of 36mg
eliquid could be viewed by the powers to be, as a different animal.
As far as the tobacco companies supporting legislation (state level) that would restrict how eliquid is provided the average consumer, they have already done that.
You are definitely more versed in the political arena than I am. Therefore, I hope you are right.
But I don't want to be on here a year from now reading a post from you that says "mea culpa", how did I miss that loop hole. So I don't think we should ignore Big Pharm, Big Tobacco or the FDA as if they can't or won't do great harm to the vaping community. And although I would not mind reasonable oversight for purely safety of content, I do not believe that the FDA is capable of doing that given that they are filled with people who would much rather have vaping banned completely.