If freedom of speech is absolutely absolute, then I can stand in the middle of my busy high street and shout that Mrs X is embezzling money from her job, is having seven simultaneous affairs with married men and keeps her husband tied up in the cellar, having murdered her previous husband and buried him under the patio.
I could block the entrance to A & E by standing in the doorway with a placard proclaiming that someone who is being delivered there by an ambulance which brought them from a serious car crash should be arrested for drunk driving immediately and not examined or treated for his extensive and life-threatening injuries until he has paid for the ambulance ride (including a 25% tip for the driver and assistant) and signed a waiver releasing those about to treat him from legal action if he should not survive, even if he is currently unconscious.
I could stand at the gate of a primary school holding a placard showing several people occupied in various graphic sexual acts, and issuing invitations to follow me if they would like to stroke some cuddly kittens, as children stream past.
I can't do any of these things, because they would be breaking one law or another. That doesn't mean we don't have freedom of speech - only that we also have laws about facts, truth, consideration for the freedom of others, and protection of children.