It's not, it's about magnitude of danger and pointing out it's not a kind of danger that's worth worrying about. This is the rational approach; contrast with media fear-mongering that likes to point out "a connection" between X and some illness, without mentioning how insignificant the connection is. Or, in this case, without noticing that you ingest the exact same thing in similar amounts from different sources, and those sources somehow aren't considered bad for you.
> Forget addiction in users who decide to smoke it, nictotine a neurotoxin
So is water, when overdosed.
> and exhaling it to people who don't want it in public places is inconsiderate.
I totally agree with that! But let's call a spade a spade - it's inconsiderate, not dangerous.