You're conflating a bunch of different things into a kind of opinion mush. A common carrier is a very specific thing legally. Being a common carrier puts you i

You're conflating a bunch of different things into a kind of opinion mush. A common carrier is a very specific thing legally. Being a common carrier puts you in a very powerful position, so the government applies regulations to common carriers so they aren't put in the position of being "kingmakers" in a wide range of industries by either blocking certain people from using their utilities or extorting them. Facebook is a publisher, essentially. Having the government step in to decide what a company can publish on their own website seems... problematic.