You mean like what underage kids already do?
Nicotine is psychoactive, and the physical act of smoking can be pleasant.
isn't it kinda the same with weed anyway?
What does that really mean? Cigarettes are psychoactive. Passed that, it's just a matter of degrees. To be honest I remember being 18 and smoking cigarettes with my friends and spacing out. In retrospect it was very lame, but kids will try to alter their consciousness however they can
The trend is pretty good, and numbers are steadily falling. E-cigarettes have been vowing though. The below stats obviously pre-date the change announced.
https://www.health.govt.nz/publication/annual-update-key-res...
A ban on smoking products dramatically reduces availability.
There are already black markets for cigarettes anyway. I think they are unavoidable.
The product of US prohibition was the creation of extremely wealthy alcohol running families who are nowadays big (legitimate) businesses in North America, built up through the wealth of the illegal operations during prohibition.
While the intention (zero smoking) would save many from suffering horrible deaths, observation of basic human motivation suggests the NZ experiment is more likely to make a few people extremely wealthy and not actually stop tobacco smoking at all, no matter how much better off people would be by not smoking.