You make a good point about variance. Eg. I could take the car, which is usually the fastest, but if I am unlucky there's a traffic jam and I have to wait. Or

You make a good point about variance. Eg. I could take the car, which is usually the fastest, but if I am unlucky there's a traffic jam and I have to wait. Or I take the bike, which is slower on average, but there is no risk of a traffic jam.