Whether you call it fortune or luck or randomness or whatever, an important skill is to recognize that you have no control over many important outcomes in your life. From NCAA brackets to investment returns to career success to your own health, the world is simply too complex and chaotic to chalk any outcome–good or bad–up to your own doing.
The reason this is important is because allowing for a healthy dose of luck in the world ought to shift our focus away from outcomes out of our control and processes and habits in our control. Do things because they make sense on their own merit–for rational and ethical and experiential reasons–and just keep doing those things even when the outcomes don’t follow in the ways we always like.