After something you don't like gets banned, how will you feel when some type of expression you DO like gets banned? Rock and roll music is next, then any words criticizing the state. As long as you agree with the flavor of fascism its okay, right?
Where does it say porn is banned?
By your logic, any laws that restricts or controls the supply, sale, or advertisement of any kind of material or content to children is against freedom of speech.
We're already seeing the massive over-blocking and encroachment starting, just weeks into the age blocking in UK's Online Safety law coming into effect.