I'm kind of surprised about the negative reaction to this.
Keep in mind the NZ health system provides universal cover. So unlike the US for example it's tax payers who cover the medical bill if your cancer sticks give you cancer and seek treatment.
Education only goes so far. People are easily fallible in the face of peer pressure, perceived societal elevation and outside market advertising.
Finding simple pleasure in something is not a good enough reason to keep something legal.
I'd welcome a similar ban here in Australi. If for no other reason than to protect others especially given the number of people I still see to this day smoking around infants and children.