Moments of whimsy are some of the most important. It was a moment of whimsy that led to me studying abroad in college, and another moment of whimsy that led me to meet my wife while I was there. Couldn't have been more than 5 total minutes of thoughts no more complicated than "yeah, I guess I'll give it a go" that shaped my entire life.
And yet, I can spend another 5 minutes in the grocery store agonizing over which of two near-identical bags of chips to buy. Funny how that goes.