Off the Deep End

I don't consider myself to be particularly bright. Indeed, I am oftentimes confounded by the limits of my intellect. The things I can't recall. Where have I put them?

Then I take a drive. Pull up to an intersection and meet some others. More often than not it seems that I am the only one who knows who has the right of way.  Same issue multiplied by a factor of twelve on the water.

Where do these people come from?  How have they navigated the world to the point that they have a motor vehicle and supposedly a 'license' to drive the thing, but have no idea at its actual operation.