You're neglecting a key point: primary and secondary education are the province of legal minors. Full legal rights of majors do not apply.
Not that there aren't problems with both P/S education and higher education or public discoure and media generally, though your analysis misses a few key salient aspects and presents numerous red herrings.
J.S. Mill affords a longer view you may appreciate:
[√] absolute dependence on authorities for food, shelter, clothing, transportation, money.
[√] curfews often in effect for you and your social circle, especially if suspected of deviance.
[√] 24/7 electronic or in-person monitoring is possible and largely accepted.
[√] social circle often molded by authorities.
[√] not allowed to vote or generally exercise political agency (and when allowed it's dismissed).
[√] not allowed to leave your workplace or home without permission from authorities.
[√] possible to flee and seek asylum but it means leaving everything behind for an uncertain future.
[√] indoctrination is so effective you're extremely likely to continue the system when allowed to be an authority.
Good thing it's a benevolent regime.