The main point of the power process: risk being a fool, is that mastery in most activities calls for the willingness to do something new, to fail, to make corrections, to fail again.
When we do something foolish and risky, we would put ourselves in a situation where we have to quickly adapt to new things if we want to survive. Even though sometimes this ended up in failure, it also give us a lot of experiences that would help us in our future decision making.