If a man beats his wife, and stops her from talking about it, has a man really beaten his wife?

The problem with this example is scale. A person is rational, but systems of people, sharing essentially gossip, at scale, is... complicated. You might also consider what happened in China during the last time there was a leader who riled up all of the youth, right? I think all systems have a 'who watches the watchmen' problem. And more broadly, the problem with censorship isn't the censorship, its that it can be wielded by bad actors against the common good, and it has a bit of ratcheting effect, where once something is censored, you can't discuss whether it should be censored.