This is a very sound example of what the right to free speech is; it is a protection for your property rights. The state can't retaliate against you for saying something, and can't compel you to accept any speech on your property.

However, as a defense of Papa Elon, it is ironic. Must and his lickspittles claim that online platform should not be allowed to block whatever speech they want.

Except speech they don't like. Like plane locations.