Yea, you're right, but thanks for getting the spirit.
> Censorship that is used to silence legitimate opinions that do not cause harm to others is a terrible thing and shouldn't exist.
That's your belief because "legitimate opinions". What is "legitimate opinions"? That is the crux.
Your sense of justice is driving your opinions. Someone else's is going to be slightly different. Okay that's obvious, but the high level is how do you decide what is right/wrong? It's a spectrum, a very wide and diverse one. What's simply stupid vs outright dangerous?
> I'm ok with any censorship/curtailing of free speech that: results in a net-surplus of free speech, endangers others ("fire" in a crowded theater), or incites violence.
FWIW, that's a contradictory statement. You cannot have a net-surplus of free speech by censoring. They're mutually exclusive ideas. You can have a net-surplus of "good done" via censorship. But what is "good done"? More lives? More freedom?
All I'm trying to get you to see is that censorship is one of the most powerful tools that exist for a society. A concrete example is Singapore's fake news law.