Nobody is making that argument. They're making the argument that the danger of vaping isn't at the same scales as the danger of cigarettes. Or rather, they're pointing it out, because that fact is not particularly controversial.
My remark was about young people doing something that is idiotic (vaping to the degree they do it) who would not take a puff on a cigarette. Arguments that vaping is "less dangerous than smoking" are precisely "At least I'm not shooting heroin in my eyeballs", because at no point did I assert that they were equivalent.
