I agree with a lot of what you said. Moderators can moderate how they see fit. When we sit down and talk about censorship honestly, most people would agree that in some form of it. Like who would want grown ass adults walking up to children and saying anything they want because of this notion of free speech. We censor ourselves when we are at work and act in a professional manner. Same when we are having conversations with people we don't know very well and we learn to read the room and avoid divisive conversations.

As far as social media and it's effect on our mental health, it doesn't look great. The internet and social media is a new phenomenon that will have to adapt to. Are places like 4chan where there's no moderation better for humans overall? I don't think so. Do we want a fascist state that controls all forms of media online and offline? Probably not. I don't think absolutes when it comes to free speech and expression is safe or healthy.