Actually, you totally have a point. Consider the case of China and its Great Firewall. If you can control the URL and separate it from the content, then you can control what people see on yet another level e.g. we aren't blocking what Wikipedia says about the Tienanmen Square massacre this is what that URL actually says. tl;dr gaslighting / rewriting history on a mass scale if you can't use the URL to get to particular server.