There's this TED talk by a "poker champion" Liv Boeree where she says that calculating probabilities is the main thing that she learned in poker and applies in everyday life. I also saw an article on that, with many poker players answering the question what they learned from the game, and the ability to estimate probabilities comes up every single time.
A quote from Liv: "So now I also try to speak in numbers as well. So if someone asks me, "Hey, Liv, do you think you're going to come along to that thing tonight?" instead of just saying to them, "Yeah, probably," I actually give them my best estimate -- say, 60 percent. Because -- I know that sounds a little odd -- but the thing is, I ran a poll on Twitter of what people understand the word "probably" to mean, and this was the spread of answers. Enormous! So apparently, it's absolutely useless at actually conveying any real information."
Liv Boeree' TED talk: https://www.ted.com/talks/liv_boeree_3_lessons_on_decision_m...