It's not just games, it's life. But to take a non-video game, e.g. in hockey the better goalies aren't better because they have awesome reflexes or quick thinking, but primarily because they're better at predicting where the puck is going to be and positioning themselves accordingly. Same thing with gamers knowing "what's ahead", or "what's ahead with probability". Very few things are so random that "more accurately predicting the future" isn't the dominating strategy, with execution of the moment, while important, not being the primary factor.