It's just an observation. I think a lot of it depends on your understanding and your definition of <i>good fortune</i>. My personal view is that everything cycles. And maybe, so does probability.
Without suggesting any certainty on my part--events seem to have a life of their own. Animated and in motion, constantly evolving into something else, they influence our progression in life.
If you survive a hurricane or a car accident, your life will have forever been changed by that event. I don't care how much control you have in your life, you're still submerged in the events of life, and those events will shape you and your destiny.
But...nothing is certain, I suppose.