The strategic value is it makes the task of threatening our sovereignty a little bit more difficult to achieve.I can’t see any strategic benefit for NZ
It is also the one capability that we can deploy and become operational the quickest
Another factor is that in the event of conflict it puts the least number of lives at risk. A battalion going into action puts 700 to 1000 men's lives at risk and is slow to deploy. A frigate 100 to 200 and again not that quick, an AFC squadron 15 to 25max.
It can react to threats of our sovereign area quicker and cover a wider area than anything else.