This is part of New Zealand's ongoing Smokefree 2025 plan, which aims to reduce smoking rates to 5% of the adult population by 2025, and later to reduce it to as close to zero as possible. So far, NZ's already introduced bans on public indoor smoking, plain packaging laws, a ban on visible displays, and progressively increasing taxes, in addition to long-standing bans on advertising.
Currently, about 13% of adult NZers are reported as smokers, down from about 18% a decade ago. I doubt NZ will make it to 5% by 2025, let alone 0% in the long run. But anything to get the numbers as low as possible I think is a good thing.
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)