The point I take away is a little bit beyond just realizing that you're lucky. That's important, and the people I've met that I consider truly successful (ones I would consider as role models), generally realize this.
However, I think we can take this further...the only variable that we have under our control is effort. Since luck is an outside force, you might as well maximize this one variable that's still under your control so that you have the best odds.
The old Louis Pasteur quote that sums it up is "Chance favors the prepared."
A lot of what happens to us in life is a matter of chance (called luck if it's in our favor). But if you aren't ready to take advantage of it, it will come to nothing.
Effort, but on what? Simply expending effort won't get you anywhere. As the moneyball example shows, you can help luck on it's way with maths and data.
Although I suppose if efficient market hypothesis is true, then even where you direct your effort must be luck.
However, I think we can take this further...the only variable that we have under our control is effort. Since luck is an outside force, you might as well maximize this one variable that's still under your control so that you have the best odds.