Haven't we discovered that social networks do have a heterogenous degree structure, that a few entities are drastically more connected than others, but that they're sorted?

The first fact is why influencers exist, and people work to become one. The second fact is why Bluesky (liberal bubble) and Gab, Gettr, and Rumble (conservative bubbles) exist? X and Truth Social are different, as each exists mainly to promulgate a single oligarch's point of view.