I'm sorry but I can't follow your argument. In reality my fans would know that the defeat of 100 points is due to having rested the starters and they will certainly return to the arena for the decisive game.
Also because in game 1 they saw their team won by 30 points, so they know they would have a big chance to see another victory.
I can agree with you that lose a game by 100 points is not completely logical but that should not have an impact to the final game of the season at all!