I wouldn't trust 'professional' instructors, I've seen them teaching learners dodgy shit. Like lane hogging, driving below the limit (don't care if it's 'safe' but it cause more trouble than its worth).
That isn't such a bad idea.
Same goes for trucks. Too many people cutting off trucks not realising that trucks take longer to brake.
I reckon it's the cause of this mornings accident in eastern freeway.