I'm not saying it is. I'm saying that today, social networks are an oligopoly and lack meaningful competition. That makes it not a free market, which means the social media companies shouldn't get to do everything that companies in a free market can, and should instead be regulated like other things that aren't free markets, e.g., utilities.

Social networks are by no means an oligopoly. There are a LOT of social networks out there. There is a lot of competition. There are few, if any, real barriers for an end user to switch to a different social network – beyond convincing their friends to do so.