Last I checked there’s a zillion TLDs wholly privately owned, even if all the registrars won’t have you it’s a whole ass internet out there.

Chrome could block domains, and so could top-level DNS.

And hosts files still exist shrugemoji

And pigeon post in case your provider disconnected you.

The requirement of cooperation of different private entities on different layers is a feature, not a bug. If you're behaving so badly that's unacceptable to all of these different people and organizations, maybe they're not the problem?

Meanwhile, no one's free speech is being prevented - convenience of reach is certainly being limited, however once again that's a feature.