You had originally indicated cigarettes and vapes should be carried at all, even if no intention for them to be used. That's different from banning their use on board.
Suggest you reread my posts. #4 I originally suggested by not allowing them as carry-on you remove the risk/ability of someone smoking or vaping illegally on board.
I then did say I would prefer they not be allowed at all, both items completely unnecessary items for a healthy safe travel - they are not genuine medical needs.
You can disagree, but I am entitled to my opinion that both smoking and vaping are disgusting, inconsiderate habits that the world would be better without.
There are many tools availably to quite smoking, but the delay in adequate regulation for vapes now means we have another looming health issue with the effects of vaping. Lungs are designed to breath air, not carcinogenic smoke or vapours. I willing to bed that they prove real harm from even the legit vapes in the next few years.
In my observation, most you see currently vaping in public are in their teens/early twenties they are not trying to quit smoking, they have never smoked but are under the misapprehension that it is cool.
Yes they are now belatedly cracking down on prescriptions, but you need only look at the over use of antibiotics to see how easily people can get a prescription from certain GPs. And how can they disprove that you are a smoker?
It is not a case of a vaper being able to easily purchase vape liquid and hardware at each and every destination. Vape liquid requires a prescription and needs to be sourced from a reputable supplier, producing the liquid under international standards.
Oh well then if vaping is so important then I guess your travel options would be limited if you couldnt carry them with you. Smoking/vaping is not some inalienable right, breathing safely is.
Such a shame the NZ government back-flipped on their aging out smoking legislation, something we need here along with similar for the vapes.