Well, the human body is designed to take in and process a certain number of toxins and still survive for a certain number of years. I think it's a lot less harmful to use pure tobacco leaf in ceremonies (this still happens at the tribe I work at) and to smoke man-made cigarettes stuffed full of odd chemicals (this totally happens all the time at the tribe I work at). Both do, and sometimes in the same individuals.
I don't know whether to look at increasing life expectancy in the civilized world as man's adaptation to environment via genetic mutation, some advances in medicine (got to BOW to vaccines, here, not to mention antibiotics) and whatnot, or a combination of both, combined with various other things... IDK. I don't worry too hard about factors I can't control, though I think I'd rather live closer to a nuclear plant than a coal one.... that type of thing....
My personal theory on alcoholism is that being able to eat decaying or fermenting nuts and berries and process them easily during cave man days was an asset, now that cheap and mass-manufactured Etoh is available, easily and cheaply, that's not so much an asset.... As it were. I come from a long line of genetic Russian alcoholics and seriously, all they had at times was potatoes and snow and I completely understand how living under such conditions might lead to... enjoyment of and manufacture of Vodka!
Everyone should manage their own tolerances and preferences how they see fit, honestly, and whether they smoke, vape, whatever, it's kind of up to one's own natural preferences and willingnesses. I'm quite sure I would look upon negative vape studies *quite* differently than I do now, than I might have as a current-smoker, never-vaper, though, if my motivation were to be to find a "reason" not to vape, and smoke instead. If I wanted to quit vaping entirely, I'd probably try to find as much research to support vaping as harmful (for personal reading) to strengthen my desires in that direction. Perspective is so important.
That said, I'm betting I wouldn't find *as much* even if I tried my hardest....
And, probably both are true. Smoking is harmful. Vaping is harmful. We don't know HOW much yet, and that will take time. But, breathing is harmful. Not breathing is harmful. We are all going to die one day. One thing I know for sure is that I don't want to go via COPD. Dropping dead of a heart attack due to continuing to ingest nicotine FTW!!! (Some day in the far off future, hopefully). Dropping dead of a heart attack is likely in my family anyway, so I'm not going to freak out.
That being said, to each his own. I find picturing death in a variety of ways to be a valuable life skill, I tend to worry about it less when I rehearse it a little mentally.... we are all going to do it, and it's like the most exciting adventure really.... If you really think about it. I know a lot about a lot of stuff, but not so much about death. Yet.
Anna