That's fine when we're talking about mom-and-pop baptist bakers that don't want to bake your gay wedding cake, or little mastodon instances that don't want Nazis coming in. (An example from both the social left and social right to choose whom they associate with - but that's not what we're debating.)

But when you're dealing with 100M MAUs or daily transaction volumes in the billions, you're no longer a person - you're infrastructure. A public square. And moreover these giant companies are few and they all move in lockstep with one another, which means you have no avenue to turn to when you get removed.