Granted, fog is no fun for driving where you need visibility and a sense of direction. I once spent an hour and a half making a fourteen mile drive up the Blue Ridge Parkway in fog so thick you could barely see the road in front of the car. That was nerve-wracking. It destroyed our sense of direction as all the edges of the road were blurred, and the landmarks were gone.
But if we didn't have times of fog, would we just keep rushing blindly from one place to another without ever appreciating what we have?