You don't even need the internet, you can just whisper to yourself inside your head. Obviously you're relying on the power company and relying on the governmen

You don't even need the internet, you can just whisper to yourself inside your head. Obviously you're relying on the power company and relying on the government of your own country to not lock you up - which brings us back to the public spaces where people can rant on street corners without being locked up - being heard by random passers by. Those same people can't rant on the internet in the same way without being banned from the sites where people might be able to discover them. A dark web site is only useful for speech if you have some way to be discovered.