You have made my point ! We know the dangers of smoking and choose to do it anyway.
Can we say the same for vaping?
And in 50-150 years, we'll be able to adequately answer your question.
You can conduct every test known to man (at an expense of hundreds of millions of dollars), you can model every possible model (at an expense of billions), but it means absolutely _nothing_, as has been demonstrated repeatedly.
Even in clinical studies of tens of thousands conducted over dozens of years, we keep getting conflicting "drink wine!" "no, don't drink wine!" "vitamin C supplement is a requirement!" "no, wait, vitamin C depletes calcium and leads to osteoporosis!", etc, so-on, ad naseum...
So, I kick it back. Shouldn't we test _every single jar_ of baby food we import? Wouldn't you agree that protecting your babies is more important than protecting a life-long smoker that has been poisoning themselves with arsenic, methane gas, heavy metals, and radio-active isotopes for decades? It's domestic and guaranteed to kill you, effectively...
And let's just forget the imports. Shouldn't we be banning automobiles? I mean, they spew tremendously toxic gasses and account for faaaar more deaths than cigarettes, let alone e-cigarettes which have caused exactly _zero_.
And while we're at it, shouldn't we ban water? Think about the deaths from water. The number of ways it can kill you is staggering.
And ultimately, shouldn't we ban breathing? It all comes down to breathing leading to death. Or cut-out the middleman and ban cellular mitosis...