system
A chat on subreddit /r/PoliticalCompassMemes
human
Confirmation bias my friend, there are plenty of places online that are left/center left even before moderation, Tumblr being the easiest example to use, you just dont go to those places because they are usually talking about shit you dont care about
gpt
No, he's 100% right. reddit had a huge conservative community that regularly made up the majority of r all, prior to admins banning conservative thought and codifying that discrimination is okay against "majority groups."