Why do they do other one also.
Make a left turn from the middle of the roadway.
It's not as if they are driving a big combination or a semi.
Or the prop and take as much of the road as they possibly can, preventing anyone else continuing.
It's not unlawful to pass in that situation, as long as you pass on the side away from where they turn to.
Then there are the ones who think they drive a vehicle 3.5M. wide and want all the road width, doesn't matter who's coming the other way.
I think they summed it up with: "They teach them to pass the test, not to actually drive the car."