So is the UK, last time I checked they're not doing so hot either. You can add this kind of argumentation to the list of ailments. Geographic or some other sort of fatalism as an excuse for what is social failure.
Where you're located when a disease hits gives you either an advantage or a disadvantage, fair enough. But it doesn't explain away repeated and continuous inability to act. If NZ had acted like the UK, they'd look just the same. Once you've got community spread the virus doesn't care if you're on an island.