Calling vaping safer without there being any good evidence for that is quite a stretch. However I despise this pure resource waste. Can we just stop that instead while we investigate the effects of inhaling burning copper and plastic?
If you're genuinely interested, I recommend starting with this report: https://www.gov.uk/government/publications/e-cigarettes-an-e...
Not surprising though.
Also, we would need sufficient evidence to conclude that they all have the user inhale burning copper or plastic, which I'm not sure we have.