My wife brought something like this up while we were watching the replay, that is they let them win to drag it out and make more money etc... She noted it looked like the Kiwi didn't bother showing up yesterday......
I told her this is not the LA Lakers in the Showtime Years where could have put a beat down on any of the teams the faced in the championship and kept it going for the TV money.
Added to which, it's sailing...any number of things could change on the race course and affect the outcome. Either boat could have a mechanical failure, crazy wind shift, hit a mark...any number of things could go wrong and change the outcome. You would be insane to "rig" it to be this close.