Absolutely. My first thought was that it could screw up the land, but the Herald article says

The full-size pitch, measuring 105x68 metres on the tussock plains of Mackenzie Country in front of Aoraki Mt Cook was created by hand over six weeks using the strictest environmental and sustainability principles to ensure the land could be restored to its pristine condition after the game.

[...] Tourism New Zealand worked with local iwi and the Department of Conservation to ensure the project respected mana whenua and had no lasting impact on the land.

I just reread the article and it's full of unusual wording that suggests it was only created for a demonstration. Basically a promo for NZ and the cup.