That's how censorship works, though. A country with mostly free speech will clearly and unambiguously ban a list of works (or types of content). There are always some limits to speech, but debates are possible as long as the rules are clearly defined.
Authoritarians expect self-censorship and have vague rules because they expect you to be making an effort to do what they want (or at least to pretend you are). Having platforms do the censorship, and banning the platforms that do a poor job is a lot more scalable than making it all centralised.
In an authoritarian state you can't get a decent official list of banned works, and in a distopian state you can't even get a list of alllowed works. Incompetence in how censorship is applied by platforms is expected, if not always tolerated.