The end of the article mentions it. Some people are not purely rational decision makers, some people are altruists who know others are not purely rational, etc.
Maybe people who choose blue do so because they assume there’s some kind of monkey paw involved in the choosing the red option, like your wife and kids die or something like that
Either everyone lives or you don't get to experience the mess that follows when red wins cause you're dead. Sounds like a strictly better option indeed.
