I'd say a better summary has to mention that there 2 types of random "things": some are predictably random (Mediocristan), and some are aren't, they're prone to Black Swans (Extremistan).
It's the latter type of randomness that we have to worry about: avoid being exposed to bad black swans (e.g. don't put all your money in the stock market), and try to be exposed to good black swans, but don't depend on it.
I'd say a better summary has to mention that there 2 types of random "things": some are predictably random (Mediocristan), and some are aren't, they're prone to Black Swans (Extremistan).
It's the latter type of randomness that we have to worry about: avoid being exposed to bad black swans (e.g. don't put all your money in the stock market), and try to be exposed to good black swans, but don't depend on it.