Every generation has some product/ingredient that they didn’t know was dangerous at the time: tobacco, lead, asbestos, etc. What is that item for this generation?

I don't think it's fair to say "safer" or even "less safe" because it's more complicated than that. Because it doesn't combust it doesn't do a lot of the same harm that cigarettes do, however, inhaling vapour creates a host of entirely different problems, one being an increased risk of pneumonia, plus the massive increase in the amount of nicotine people who vape consume can affect your bladder, oddly enough. People are just ill informed tbh.

I am pretty sure everyone including those who use it know it's dangerous. Slightly safer than cigarette yeah sure but no sane person would call it safe.