Earlier quoted context omitted.
Having worked filling shelves in a supermarket, I disagree that it applies to every field.
I would imagine the depth there is in determining what goes where on the shelf. You as shelf-filler probably didn't get to make this decision though.
Depends whether someone gets to just fill the shelf as per plan or has the curiosity to ask "WHY", noticing why X things fly off the shelf why Y things two shelves lower stay there forever. This curiosity builds the critical thinking 'muscle' and can motivate a shelf-filler to switch into marketing (hypothetical scenario has to do with a 17yo working part time and then deciding to studio marketing)(I didn't study marketing) :)