It's a form of brainwashing. Children (or leftist, lol) don't have the mental fortitude or critical thinking skills to see through a comprehensive deception supported by social condemnation, authority figures, etc. So if they even detect the lies by omission, the logical contradictions, the appeals to emotion and authority; they buckle, lacking the will to disagree. Then they're ask to publicly declare their belief, so as to internalize it. The same as how a torture victim is told to confess; or cult victim, etc. They're bombarded with agenda advertisements (school material) to associate dopamine release with the agenda. Of course it's ineffectual on some.