I have never seen police target a multi lane roundabout to catch all the drivers that don't know the indicating rules.
I have never seen a police sting on an intersection for red light runners.
I have never seen police targeting an intersection where people are turning into a multi lane road & should be turning into the closest lane.
I have seen police sitting at the end of a passing lane.
I have seen police sitting on the only reasonable length straight section of road in 30km in the mountains, to catch overtakers.
I have seen speed camera vans on safe long straight stretches of road.
There are things that can be done before making everybody spend time & money on sitting a test.