Yeah, it is insane. My partner used a vape to quit and it was actually useful. I titrated the nicotine level down by 10% per refill, usually taking about a fortnight to get through. The use level would increase for the first few days but drop back down by the next refill. By the end when we dropped all the way to zero there was so little nicotine it wasn't really noticeable. After that it was just the behavioural habit and that dropped by itself after a few months.

Compared with nicotine gum and patches it was way more effective and really did result in a long term quit. They are now approaching 10 years quit and it was absolutely worth doing. Harm reduction would suggest using vapes to help people quit and honestly to replace smoking all together.