I think you've missed the point. Until the proposed FDA deeming regulations are finalized and become part of the FSPTCA, vapor products are NOT tobacco products, that is the main purpose of the proposed regulations.
High fructose corn syrup is derived from corn. Is a can of soda, whether or not it contains HFCS, an agricultural product? Is it a Corn product? Is it subject to the same rules, regulations, taxes and fee schedules as corn products? Does Pepsi get a subsidy check for not producing cans of soda?
We are not talking chemical definitions.
I think with your analogy of a can of soda being an agricultural product vs. nicotine not being a tobacco product is a bit derived. I think you are venturing in semantics here.