The fact that certain industries have a lot of foreign ownership doesn't mean that they're not part of the actual economy. They produce in NZ, they employ in NZ, they buy inputs in NZ - they're part of NZ's GDP economy.
And the rest of your statement makes no sense. Some tertiary industries service primary industries, but most don't. Some housebuilding and education services immigrants, but the vast majority isn't, and regardless of that fact, it still counts as part of the local GDP. Services are no less "real" than resource industries.
And the rest of your statement makes no sense. Some tertiary industries service primary industries, but most don't. Some housebuilding and education services immigrants, but the vast majority isn't, and regardless of that fact, it still counts as part of the local GDP. Services are no less "real" than resource industries.