Harry said it right too....not one single method of teaching works as we all have different motivators. The key to being a good instructor is being able to figure out how to motivate the one being taught. Any one that has Principles of Instruction should be aware of that.
It's a very British trait where there is a reluctance to point out mistakes to senior personnel, or question their decisions for fear of being wrong and looking stupid.
It has been my experience with the British (for the Ex-British Army anyway)....it was the other way around.....the Seniors did not like being shown to be stupid and wrong. The RN and RAF guys all seemed quite reasonable and decent Chaps. The Dark Blue crowd seemed to be far more fun in the Mess after duty was done.