I think that private entities being able to limit the speech that is performed on their property is an expression of their own free speech, and should be protected by the right that protects that speech from intrusion by the government.

I also think that us being forced to rely on private platforms for public discourse is a grave threat to democracy. There must be public forums that are strong enough to be viable and legitimate places for the majority of public political discourse to take place without relying on private institutions.

It's an "expression of their own free speech" that - thanks to Section 230 - comes without any of the restrictions or liability that would apply if it was actually their own speech. They're very much getting to have their cake and eat it here.

Then they have a baseless false expectation.