You are correct, I believe the risk of dropping out to do a startup is large enough as to be considered reckless. We can argue about Facebook all day, as many

You are correct, I believe the risk of dropping out to do a startup is large enough as to be considered reckless. We can argue about Facebook all day, as many have before, but even that in itself lends support to the notion that it was mostly luck. We cannot agree on and point to any specific idea, or combination of ideas, that lead to Facebook's success over others. More, we cannot show that Zuckerberg actually held any such idea as the basis for his actions. Targeting schools? Convenience. Targeting social? A common idea at the time. Using php? Convenience and a common choice at the time. Not all successes are due to some sort of genius. Many are just unexpected and happy results.