If New Zealand will experience better summers/winters due to climate change and be the least affected by climate change (according to Reddit), why did Jim Salinger (a climate scientist from New Zealand) say that we should act on climate change now?

https://www.quora.com/If-New-Zealand-will-experience-better-summers-winters-due-to-climate-change-and-be-the-least-affected-by-climate-change-according-to-Reddit-why-did-Jim-Salinger-a-climate-scientist-from-New-Zealand-say-that-we