I started to answer this earlier but wasn't in the mood for cig talk.
I agree with you, Germlat, off the top of my head, for your reasons, but I've biases.
I'm probably not for nicotine gum either, for similar reasons. My bias is that I quit cold, ah, twice, the second one taking, a heavy smoker for twenty years long ago. I so like clean air, but never mind.
The thing was that I kept smoking and smoking to calm myself, relax, enjoy, but when I quit at last, I was... a much calmer person.
With these devices, it just prolongs nicotine attachment, sez me. Plus, being me, I bet if I saw someone with one of those I'd laugh. Apologies to people they are somehow saving (or starting up). That apology isn't completely insincere.