I agree, but unfortunately with the FDA's crappy report (which I can no longer even find on the FDA site, but it is the one that prompted the ECA's response study) has put us in the seat of proving it, or accepting the FDA as gospel as others do. But again I agree and it is also the rules. Drug companies are forced to prove their drugs to the FDA, the FDA is not forced to prove a drug bad, we are not in a criminal court.
And logically you can not draw any conclusion without all the facts. The earth appears flat. So logically there must be an edge of the earth. And even though no one ever actually saw the edge of the earth (the major missing fact), people assumed it was fact. Pigs and monkeys are much closer to human physiology than rats. The children in the PG mist study did not have long term exposure (years to decades worth).
But I agree there will most likely not be any direct long term effects. If there is no direct effects, then the second hand issues becomes a nearly mute point. I am just posing the issue of making long term claims without long term experience. I wish someone could sign us all up for a long term study (and not by some group that is gonna jump to conclusion ie the food products you commonly see in the news one week as bad for you and next month good for you)
Hell, even if the consequences were the same as analogs, reduced price, increased lung capacity and great flavors would keep me vaping.