Okay Jerry, let me break it down for you in a way that is maybe easier to understand.
A statute is passed that says: It will be hereinafter illegal to wear yellow shirts made out of cotton.
Do you know how foolish you would sound saying "Omigod, they are going to prevent me from wearing my favorite blue nylon shirt"?
Although the statute only outlawed yellow cotton shirts, you mistakenly assumed it outlawed all shirts.
That is exactly what you are doing here. The PACT Act, as written, covers "cigarettes" and "smokeless tobacco" products. Both of those things have a specific definition found in the act. They are two specifically defined kinds of tobacco products, out of the whole universe of "tobacco products" (it doesn't cover cigars, or pipe tobacco, either).
You are saying that if the ecig is ruled a "tobacco product" (a shirt), omigod the PACT Act must apply to it, despite the fact that it only applies to specific tobacco products (yellow, cotton shirts).