This sentiment always annoys me. Show me the numbers specifically with a cautious driver that doesn't drink and drive. Oh, and that driver also has to be me in order to be applicable to me, because I am driving the car.
Being cautious has zero affect on all the not cautious people around you. If a dude is drunk and drifts across the lane and hits you head on you can be as cautious as you want and it won't matter.