A specious argument at best. I've seen two pit bull attacks. One of them on a human being, on on a leashed dog.quote:
When a pit bull does what any dog can do, show aggression and bite, the damages can be severe. In the case of the dog attack, the pit bull took multiple blows to the head with a tire iron and before it let go. Fortunately, the dog on human attack happened at a construction site and several workers with steel toed boots were able to defend the person with them.
By the way, the person was permanently scarred and the leashed spaniel died.
The reason people shouldn't own pit bulls is the same reason we don't give handguns to monkeys.