Pretty much this.
NZ has a tendency to keep a very low profile in any war situation. We're not a provocative or threatening society. We don't have any major war assets. We don't even have a pivotal tactical location
A foreign power would steamroll us if they invaded, by why would they want to?
We sent plenty of troops into WWI and WWII, we kicked some ferocious ass next to the brits, but we received no retribution for it. The Japanese ignored us and attacked the Australians instead
We sent troops into the War on Terror too. But Al-Qaeda still don't give a rats arse about NZ and continued sending their suicide bombers to every other nation except us.
So with that in mind, it's likely WWIII still wont really come to me. NZ will sit on the sidelines as always and watch everything happen, then switch the channel over to the Rugby.
On the other hand, however, I do have half my family in the US. Which is a very high profile target. I can't say I wont be completely unaffected. I will care what happens to my family if WWIII comes to California
And furthermore, if the destruction caused by WWIII is of the vast thermonuclear kind, it doesn't matter what part of the world I will be in. I'll be affected by that and die along with the rest of the human race