Fair point, starkers, but another to look at it is that the approval for Pfizer's vaccine did happen very fast in both countries. A whole lot faster than normally happens.
There's a possibility - however small - that things have been rushed. Firstly, the vaccine might not work as intended. It might have ugly side effects. It might not work at all.
New Zealand won't be getting any vaccines until March, by which time we should know which one is the most effective and how it's best used.
And the new variant found in the UK throws a curveball - what if none of the vaccines, which work on the other varients of Covid19, don't work on that one, which becomes the dominant strain affecting the most people?