Why do people have this notion that Facebook is some unbiased public space, like an undisturbed forest or a beach where passersby can pedal their wares or somet

Why do people have this notion that Facebook is some unbiased public space, like an undisturbed forest or a beach where passersby can pedal their wares or something? Facebook is like a dystopian shopping mall combined with Clockwerk Orange reeducation techniques. Due to it's algorithmic nature, Facebook ultimately decides every single post, ad, like, and person you see, and in what order. Creating a housing ad and targeting white people is not like putting an ad on the smooth jazz station, it is like having a storefront in the rich-whites-only section of the Facebook mall. In fact it's even worse because other people don't even know the rich-whites-only section exists, since they can never see it, even if they are your friend! I actually have a hard time imagining how an online system could reinforce existing class and race structures any more than Facebook currently does, short of disallowing users to become friends if it detects that this would be financially disadvantageous to allow.