Well, luckily for the aviation world I am just lowly groundstaff in (hawk spit) cargo (you know, the dirty building tucked away at the back of the airport behind the refuse tip).
I came across this in a training session, teaching me to 'suck eggs' coz I knowed it all don't I.
The trainer did exactly what you are suggesting, which we all thought was a waste of time. Until he pointed out that we had all done something that was against regulations, endangered the safety of the aircraft and was quite possibly a 'go direct to jail, do not pass go & do not collect $200' type offense.
(darned if I can remember what it was now)
Thing is that we paid a lot of attention for the rest of the 2 days...
I always found it useful to keep it in the back of the memory file, a sort of "Hold on a mo', half a tick, can I really actually know this? double check the manual"