It is a shame that you have dismissed my posting as Silly.
The information within it is accurate. The reason that many instructors are keen on the technique (as are many flight schools - Lufthansa to name but one), is that they see it as offering a ready transition from the handling of small aircraft, to the handling of airliners.
It amounts to the same rationale as certain schools have for developing extensive MCC Challenge-response checklists for PA28s. It is not that they are necessary, but they offer a better transition into the cockpit of a commercial jet, once the basic training is set aside. To somebody like you with no ambitions beyond small GA types, the technique may seem irrelevant.
2D