What are you going to change us to? I'm quite happy for New Zealand to explore new stuff, but we've struggled to branch out from those staples. Personally, I'm quite happy we're a food producer and exporter rather than a country that needs to import (yes I know we do import stuff like Canadian pork, but it's not a necessity for us).
And we're always going to have mining at some level. A fair chunk on the North Island ranges are smeared all over the country in the form of roads for a start.
edit: and frankly if you're going to tell me what, how and why I think what I think then I'm not sure I can be bothered with this discussion. Work I did over the summer will probably be used to help regulate agriculture, rather than let it continue as it is which is the picture your ad hominem attack would paint.