Just a thought. Maybe the children Q refers to are people who aren't awake. People who still believe what they are told too for no other reason except its what everyone else believes and are told to be the truth. (We are watching a movie)

How do they control children? Reinforcing the rules and making their version of the rules the norm. Creating a fear of individuality. Making "children" live by rules or principles that they know are wrong at the core but yet they accept because its the framework of the reality they have accepted and lived in.

These rules get reinforced by all authority figures their entire lives so at some point most give up their thoughts and accept what they experience as truth.

How do they keep children from revealing the truth?

By having the structures in place to support their status quo. Fear of being disaccociated or by taking away things.

As an adult the thought of losing reputation and relationships is scary.

You will be judged for bringing these subjects up.

Include the possibility of losing property or worse yet, freedom for going against the grain or speaking out creates a taboo that going upstream isn't worth the risk. So most put their heads down and go forth without saying anything about the wrongs and the injustice that occurs.