No I do get it and that silly argument has no weight on this topic. It doesn't matter what we think or even know vapor to be. The point being in most cases you can vape in pubic such as walking down the street or sitting on a bench or whatever. However indoors is a seperate topic and isn't your choice, its up to the establishment. This isn't hard to understand.
But your basic assumption is the every establishment has rules against vaping. And it simply isn't true.
I'm perfectly willing to abide by their rules. I agree they have a right to make a no vaping rule if they choose. But in my experience, not many places have those rules. And while you assume that "If they haven't made a rule, it means we can't vape", I disagree.
The only two options you seem to see are "vaping is banned" or "there are no rules about vaping, therefore we can't vape".
If I'm aware that a business has a no vaping rule, I will comply. If a bar does that, I'm not likely to go back again. I won't vape in a persons car or vehicle if it bothers them, but that rarely comes up. If I ran a business and didn't want people vaping, I'd put up a sign, just like they used to do with No Smoking signs before the government took the option away from the business.
I vape in public every day, and it's never an issue. But on ECF, there are always people complaining that we shouldn't vape in public, that we should treat it like smoking, that we should assume there are rules against vaping. That just doesn't make any sense to me.