Yes, and that works fine because there's no platform there, just a 1 on 1 or small group conversation. You can still easily replicate this, unmoderated, with email or various messaging apps.

Once you can talk to potentially hundreds or thousands of people at once, once there's a platform, that model breaks down. Bad actors who would be uninterested in trolling single individuals are very interested in trolling hundreds at a time. And nobody wants to "walk away" from an otherwise good community because of handful of very loud people are spouting hate there.

Any platform that's both popular and unmoderated will eventually be dominated by extreme content, and will push out normal people, who will go somewhere that's popular and moderated.