It's common sense. Nobody is trained to drive a car using GPS navigation as their primary instrument for situational awareness. You're supposed to react to the

It's common sense. Nobody is trained to drive a car using GPS navigation as their primary instrument for situational awareness. You're supposed to react to the conditions of the route to ensure the vehicle operates in favorable conditions - be it rain, snow or darkness. Military pilots are taught the same thing, because operating a vehicle is about maintaining control at all costs.