Hypothetically, if governments wordwide just suddenly became authoritarian and deleted all records of history, you and some survivors escape to a remote area outside of government control, they all can’t remember much from history (either didn’t pay attwntion in class, or suffers memory loss from the governemtn attacks) and so you are designated as this community’s official historian. How much can you remember? What’s gonna be the official narrative of your little rebel community?
The book is prescient as hell. He saw the natural consequences of that reality and followed it to it’s logical, inevitable ends. He may not have intended for the book to be about censorship, but censorship is an unavoidable, inevitable outcome for a society in which most people are uneducated, uninformed, ambivalent ignoramuses. There will always be someone to take advantage of them and to make sure that advantage is defended.