Why genius people make silliest mistakes?

I have seen people with extra ordinary capabilities and past records make silliest mistake that look very unlikely from a person of their capabilities and reputation.
I see MS Dhoni’s decision to send Jadeja earlier than yuvraj and himself was one such mistake. Because dhoni has shown many a times that how change in otherwise routine decisions can bring extra ordinary results. But probably this move did not work.
Sometimes I feel it is the overconfidence of these genius brains that they overlook simple facts and logics and face undue criticism.
I feel we should give them the benefits of majority of positive results produced by them and forgive one or two odd cases where the plan placed did not work.
We should know that simplest logics and IQ at many times is not that simple to follow.