Why are there limitations on freedom of speech

The limitations are, defamation, incitement to violence and true threats of violence. These are limitations because they threaten a persons well being as well they can harm others, they are limits because when someone is truly speaking I’m violent or threatening ways we can’t always put that aside sometimes the law does have to get involved, if there was no law and we could really say anything and be as violet as we wanted, imagine how many bad people would be out there in the world.