Simple, our drivers training system SUCKS. It is a complete and total joke. Here in Colorado behind the wheel can be taught by any adult willing to sign the paperwork. The test is easy. Then the cops, the worthless ass brainwashed cops... Start paying attention to actual traffic safety not just speed enforcement and revenue. I probably should not get started on how poorly I think cops understand traffic safety.
To back up your point, when I was in Italy, driving a rented 670hp Ferrari across the countryside for a day... Trucks are forced to stay in the right lane. You never have to worry about them pulling out and blocking traffic. Left lane is for hauling butt and in a whole day and 400 miles of driving I never saw one speed cop, or any highway accidents. Lots and lots of tunnels between Florence and Maranello, almost every one taken foot to the floor with a line of slow traffic to the right. LOT's of triple digit speeds that day and not even a close call because of firm lane discipline on the highway. In the cities, well, that gets interesting, never have my palms sweated like that...