Well, that is commonly said;
"........bearing in mind that it is about attitude flying"
I do not agree. the elevator is used to set the required attitude in pitch. The trim relieves the pilot of the control loads. The trim
is not a flight control.
The high load demonstration is important for the student to understand just how overwhelming the trim can be, when mis-set, in some aeroplanes. It should also be a heads up to the importance of the trim pre-flight checks.