Well, I read the German study that quantified the chemicals.
Think about it. It makes sense. It’s putting that stuff into vapor form. And e-smokers breathe it out just like smoke. Which means bystanders are inhaling second hand e-vapors. Are they safe? Don’t know. I don’t know what’s in the e-vapors. I doubt most e-smokers know or care.
Nobody has studied what happens when you inhale these chemicals long term. So nobody should assume that they are safe.
Then you say nobody knows if it's safe.
If nobody knows if it's safe then how can they know it's not safe, and why would you repeat it if you already knew they can't possibly know that?