We don’t consider a quarterback great for running the plays well.
We consider him great when he plays well when the play breaks down.
How does he get great at playing when the play breaks down? Ironically, by running plays so many times he knows them unconsciously.
It’s the same in any other place leadership shows. You have to practice what you can prepare for as much as you can to prepare as best you can for what you can’t predict or prepare for.
In other terminology, anyone can pilot a ship in calm weather. You can tell a great pilot by how he pilots the ship when the wind gusts and the water turns white.