This is how free speech works. You are allowed to say anything you want and the government can’t stop you. You are, however, accountable if what you say is false and causes harm to others.
Unfortunately, because of the way our media cycle works, the damage is done way before the perpetrator is held accountable and the corrective action is not broadcast well enough to reverse the damage from the original action. Especially, when the correction gets shrugged off while the perpetrator goes on another round of disinformation.