If we try to win the no-harm debate, we will lose.
Even if we can point out that urban air has existing, and in some cases higher, levels of all the things that have been documented as being present in vape vapor, the obvious counter is that that urban air will be drawn in through our AC holes and our coil's product will just add to that.
Vapor is not good for you. Hell, it's not even not NOT bad for you.
If you want nicotine for its own merits, chew some gum, or eat a bunch of tomatoes. If you're trying to cease the MUCH worse combustible habit, go cold-turkey. Everyone knows someone who quit cold-turkey, so you should be able to, too.
We're not going to win an argument based on statistics and logic, because the other side doesn't care. The non-smokers don't understand, and the cold-turkey quitters feel superior to the rest of us.
If we're going to win this, it is going to be based on the "none of your damned business" clause of the constitution. Many folks miss it, but it's there, between every line in the document.
This is why the Libertarian vein comes out in this debate so heavily. People who would never consider themselves of that particular political bent quickly discover their Libertarian leanings when their own personal issue comes under attack.
I've brought up my firearms-industry perspective multiple times throughout this discussion- but there are legitimate parallels.
I've watched high-dollar focus-group feed-back, and it can surprise you.
I've watched a group of "anti-gun" subjects maintain their anti position through discussions of personal protection - "a rape victim is just as likely to have her gun stolen and end up killed instead of just raped".
I've seen them dispel the merits of teaching gun-safety to kids - "yeah, but they'll end up complacent and think they know how to handle them around friends".
But, when you talk about personal freedom, everything changes. Point out, to an anti-gunner, that they're "probably right", and if they're "trusted" with a weapon of their own, they'll probably just end up hurting themselves or a family member, and the claws come out.
Everyone thinks they're above average, and the well-meaning restrictions they'd place on others, for their own good, are just because "the masses are really dumb".
If ONLY the harm-reduction is engaged, then, at best, we'll end up with closed-systems using state-defined nic levels, packaged by multi-million dollar "trusted" BT and BP labs.
The only way you're going to keep the right to taste-test juice in a shop to take home and drip onto the coil of your choice, is to win the personal-freedoms debate.
People just can't seem to help thinking that what is best for them is best for everyone else.