> Everyone can now play an active part in the conversation with barely any barriers at all.

There are barriers. What people will actually see are mediated by algorithms that favor certain styles of presentation and types of content. It takes a fair amount of knowledge to not just make a point, but make it in a way that will gain traction rather than being shouted into a void. That knowledge comes from refinement and practice. It's why everyone on Twitter starts to sound the same once they get a big follower count. The likes and shares are actually training them to talk about certain things and certain ways through a reinforcement loop.