it’s more than analog cigarettes

I assume you mean less and yeah, that would make sense on the face of it. It just seems as though there’s no empirical evidence that nicotine specifically causes skin damage - only evidence that it causes blood vessel constriction. Do you have a source that shows a causal relationship from constricting blood vessels to poor skin health? That again would make sense to me, but I just don’t like to base my positions on assumptions - I’m a raw data sort of person.

There’s definitely no world where nicotine is harmless - it causes very clear harms beyond simple addiction that we’ve known for some time - but it’s important to be accurate around how much safer nicotine is in its other forms, particularly as you mentioned that it’s a necessary medicinal quit-smoking aid compound.

If vaping nicotine is the equivalent of five minutes of sun exposure per day without sunscreen, that’s a tolerable risk. If it causes anywhere near 50% of the damage that cigarettes cause, that’s a serious issue.