It's a first past the post system. Which results in a two party duopoly and voting for anyone else can actively harm your interests. So we don't actually have

It's a first past the post system. Which results in a two party duopoly and voting for anyone else can actively harm your interests. So we don't actually have a choice, our politics are as rigged as American politics. A small cabal pick the two PM choices, and we have to pick between bad or worse.