Pitts are built to do a lot of damage. They are the type of dog that will bite and continue the attack. It's in their DNA.
There are many other breeds built the same way. herding/guard dogs being one of them. Rotts, Kangals, Belgian Malinois ,Dogo Argentino are some. They are not generally a good breed for most people. People are the problem with the Pitt type dogs, and it's much harder (it would appear) to train the owners. It's sad, because if we could eliminate the Pitt from the picture, it would be replaced by another breed by idiot people in short order. Where I live in the Peoples Republic of Oregon, idiots bring their potential trouble makers into public places like the grocery store, and If you say anything to them, the employees take their side. (They are service dogs) Bull Shite!