In the past people were told they had Free Speech, but they didn't have Free access to Broadcast Media (newspapers/radio/tv/movie studios/satellites). It was always up to someone else with Access to Broadcast(one to all messaging) to prop up voices they thought was important.
Shannon's Information theory tells us Social Media as a system can't work cause - once you tell people their voice matters, give everyone in the room a mic, plugged into the same sound system, and allow everyone to speak, firstly you get massive noise, secondly as a reaction people will scream louder and louder and repeat their message more and more. Noise only compounds. The math says it can't work. The way people are debating about this is under an assumption that it can.