The more you are ignorant of those design choices in a system, the easier it is for those in power to launder justifications for their actions with those systems.
Suddenly it's the system's "fault" for why something happened the way it did. You hear people say things like, "I'm sorry, the computer won't let me do that," as if what's possible is defined by the limitations of the system, not the choices of the designer(s).
A machine cannot be held accountable, only people.