And um, yes, the supplement industry is essentially unregulated and is notorious for doing exactly that - putting random shit in there that hasn't been tested for safety and isn't listed on the label. That's up to and including controlled prescription medications.
https://www.livescience.com/40357-herbal-products-unlisted-i...
https://well.blogs.nytimes.com/2014/10/21/dangerous-dietary-...
Nor did I ever say, or even imply, we should stop selling e-cigs or any other product for that matter.