Watching Russian dashcam videos you'd think people found their licenses in a cereal box yet it requires a stern test with theoretical questions of the form "Here is an intersection, one street has a rail line, there are an ambulance, a fire truck, a military column and a bus on each side, who has the right of way?" (and the answer is that it's a bus because even though the fire truck would have a right of way normally it loses it because it would need to cross the rail line as specified in the Chapter 8.19.75 of the Federal Rules of the Road). And the driving part involves driving a manual transmission vehicle without power anything through an obstacle course.

So I would not correlate the driving test difficulty with the behavior on the roads.