Wishing for a horse, In a way your post makes the point that we lovers of the Pit Bull type of dog, are trying to make. The hysteria provoked by an example of a pit bull running amoke and severly hurting a child or indeed any human is justified in the context of that dog. A ferocious dog kept deliberately for aggression or worse, dog fighting, is unacceptable in modern civilised society. But it is highly likely that the dog was deliberately trained by a human to be vicious.
Because the errant dog happens to be of the pit bull type is probably because of the powerful conformation of the dog. It is a form of racism but as applied to equines rather than humans. Paint one dog bad, all dogs of that breed are bad.
As for German Shepherds it is common for this breed to be used by law enforcement officers around the world. They can readily be trained to attack any human on command by the handler. I have never seen a Pit Bull type be used for this purpose yet in many ways they would make good police dogs.
I personally am wary of German SHepherds partly because I know of two aggressive dogs kept locally by a woman who does not have full control over them. Her dogs tried to savage my terrier whom I had picked up off the ground to protect her. There was me, restraining my Rottweiler in one hand and carrying my terrier in the other. But neither of those Shepherds would back off. Eventually the woman's son pulled them off.
But I still don't blame the breed - I blame the owner.
This is a difficult subject. Some horses bite and kick but we don't condem all horses because of a few rogues to be found here and there.