Why would the strategy be difficult to understand when the results so obviously speak for themselves?

Sure, NZ's approach cannot be replicated everywhere else, but the fact is they have this under control and their people can (now) go about their lives.

I think the approach and results have been great. But I'm not clear on what the long term plan will be. Will NZ keep its policies this way indefinitely? Same question for China and other areas that have it under control.

Assuming a vaccine doesn't come, why shouldn't NZ keep their policy up indefinitely? Testing and quarantining visitors doesn't seem that onerous to me. Certainly beats just letting it run wild in the population.