I will be the first to tell you that my experience with pit bulls is very limited. However, I have a dear friend who had a lovely pit bull. She was just as sweet and affectionate as she could be. He also had an Australian Shepherd puppy. The puppy and the pit bull seemed to get along. They played and even slept together. One day my friend went to town to run some errands, leaving the two dogs playing in the yard. When he came home, instead of two dogs coming to greet him, there was only one. It was the pit bull and she was covered in blood. He found the puppy, or what was left of him, literally shredded. There were body parts and blood everywhere. It was obvious the pit bull had killed him in a fit of rage. What set her off, no one will ever know. The puppy was only four months old. My friend was heartbroken. Not only had he lost his puppy, but he decided for the welfare of all concerned, to have the pit bull put down a few days later. In other words, he lost both of the dogs he loved dearly.
That's the thing. It's in their hard wiring. They can be fine. ...and then they're not. Which is why so many of the attacks are on familiar people and even their own families.
I know there are fans of pit-types. Personally, I think they're playing Russian Roulette with animals who were specifically bred to be killers. That's what the name means -- they were put into rings, or pits, to kill bulls and bears for sport.
When I posted that chart earlier I hadn't learned that only 5% of the dogs in America are pit bulls. That means that 5% of the dogs in the country are causing 66% of the bite fatalities. Like I said, Russian Roulette. It will work for most people but who wants to be the unlucky one when the consequences can be so dire?