I think you are the only one that can decide that for yourself. Also, have you ever taken an antibiotic? I won't argue the safety of vaping with someone who doesn't realize that life expectancy has only increased with modern medicine, as the benefits of taking medication safely and as prescribed by decent, well-educated doctors FAR outweighs many side effects or even fatalities, over the long haul. Do you refuse vaccinations as well? You do realize they have done more to wipe out illnesses and plagues in the modern world than almost anything else, that and decent hygiene practices?
I'm not going to argue with someone who somehow magically exempts "advil" as harmless and refuses all other medicine. I just can't go there, I'm sorry. You should do what you wish, and if you decide that it's "too harmful" then that is absolutely your right. Do you not know that NSAIDs cause liver failure in some folks?
I don't usually say I'm "allergic" to PG, I say I have an "inhaled sensitivity" to it. It's not a typical allergic reaction, but I still cannot use it. That doesn't mean others have any sort of problem with it.
I am in no way allergic to most flavors or sweeteners, and you've probably encountered them yourself in the course of entering a restaurant and eating there, you just may not be aware of the amounts of "enhancements" that are going on in your food.
Have a freakout if you want, it sounds like you wish to be free of vaping, smoking, and all medicines? Good luck to you, but I feel for your caregiver(s) during your end of days, if that's how it's going to go... My stepfather died of a treatable cancer that would have given him decades more of life and a possible cure and he refused it, because like you, he was uninformed and frightened. He had that right, but we did not have a very good time trying to help him die with dignity, however. It wasn't dignified, and it was quite sad.
It was still, however, his choice, and we did not try to convince him. Just as I'm not really trying to convince you, but I'm a bit
about it all...
Anna