Narrative is controlled by censorship.
And/or propaganda.
Everyone can feel censorship, everyone can learn what they're punished for saying.
Propaganda, though, that can feel like learning, like personal growth and development.
If censorship comes with a stick, propaganda is a carrot.
And today, we have as much of a problem with metaphorical obesity as with literal obesity.
This was the old world. In our world narrative control is not by restrictions, but by abundance. Flood the zone writ large.