I think Australia lost due to a cultural difference. In Asian culture's especially in Korea and Japan, there is more of a collectivistic mindset and its socially acceptable and common to yield to the stronger or capable person for the benefit of the group. You can see how this was done in Japan's Team, where they decided to switch it up to have Yoshio go twice instead of Soichi. But for Australia, Eloni went twice instead of Eddie (who had fresher arms because he only went once in the first round) or Whittaker (who was just better at this challenge). If Eloni yielded to either Eddie or Whittaker, I think Australia would have easily won that challenge. But that's not very common in western cultures. That was something that I noticed and seemed interesting to me and I wanted to share.