Ultimately, NOT introducing any foreign substances (like VG and PG vapor) into the lungs is always better for you than doing it...
The problem I have with this statement, that is repeated endlessly here by even the most devout vapers, is that it applies an absolute zero tolerance philosophy to one single aspect of our lives.
We will never know the effect of all the radio wave radiation we subject ourselves to. We will never know because there are no human control samples left on this planet that experience a radio free environment. But NO ONE says that we should all get rid of our wireless routers and cell phones because a radio-free world "must be better". Those people are, quite literally, brushed off as "tin hatters".
We never hear anyone suggest we should stay out of urban areas whenever possible to avoid pollutants, and never drive down the highway with our windows down. Never. But surely it must be better to avoid pollution when at all possible. That means no entertainment nights in the city, should you live in the suburbs. No unnecessary use of highways.
Do we really know that long term (40+ years) use of caffeine is truly harmless? Are there any human control samples that have never consumed caffeine that could be used in epidemiological studies? That means no coffee, no tea, no soda, no energy drinks, no nothing that contains caffeine. Surely we should not ingest anything unnecessarily. Especially something known to be addictive like caffeine.
Everyone is so propagandized by the ANTZI they don't even realize it. If you made a list of everything that *could* hurt you, that *hasn't been studied enough" (try proving those negatives) and railed on about the "potential dangers" we would all just find a bridge to jump off. But we don't. We accept low to minuscule risk and we accept we don't know everything and go about our lives.
Except for vaping, which is held to a special standard, by almost everyone, even most of the truly devout here.