Because most of the time, when you're driving already 150 km/h (= 20 km/h over the limit), there will be an asshole that comes at 180 km/h and that will headlig

Because most of the time, when you're driving already 150 km/h (= 20 km/h over the limit), there will be an asshole that comes at 180 km/h and that will headlight you until you move. Source: speaking from experience