You neglect to mention that the nearest international airport to Auckland, NZ's international gateway, is Sydney which is over 3 hours flying time away, while the UK's major international hubs, LHR, LGW & MAN are all less than 1 hour away. You can drive from MAN to Scotland in less time than it takes to fly from Auckland to Sydney. You are not comparing like with like when you compare Scotland to NZ in this instance.