Don't you know what a joke is? (although, in my experience, people who react like this to not even a real accusation usually have something to hide)
Anyway, it's still MUCH less complicated to calculate then tennis for example, where at the same time one person is posting partial women's quarterfinals + mixed doubles semifinals, while someone else is posting men's quarterfinals. Here you scroll through predictions for the same stage (especially with only certain stages being selected, with several days between them).
Plus, it's easier to give points stage-by-stage, then to go through every stage separately for each user at the end.