Why? Because slippery slope?

So I can't have any authentic speech ever because someone might want to remain anon.

What am I missing here? On the internet, no one knows you're a dog. We are all anon. There is no verifiable authentic speech.

Would you trust unsigned apps?

How much science is done anonymously?

We insist that websites are authenticated (using HTTPS).

But not Freedom Speeches™. Totally different. Authenticating any speech whatsoever is... Is what? How does authenticated speech harm any one? How?