They cant tell, Your 100% right, they say that so you dont take it apart forget where it goes lose the peaces and send it back and say "its defective look its missing 90% of the screws" or some crap like that.
My friend has taken apart his kershaw oso sweet when the speed safe broke to see if he could do it and he couldnt so he reassembled and sent it to kershaw and he had no problems,