What you are really talking about is teaching the 'why' of checklist items...vs 'just do this'.....
Yep, important...but the nature of the beast is that 200 hour instructors teaching 50 hour students is such that the instructors aren't typically that understanding of what they are doing to explain this 'why' of this stuff....
Case in point....you are at 10,000 ft...the engine runs rough...so you put the carb heat on...you practically kill the engine....What's going on?