And you'll notice those studies use 'pit bull' with a lower case. There is a Pit Bull, the American Pit Bull. The American Pit Bull is a problem. However, when the term 'pit bull' is used, you have no idea what other breeds are included. Lower-case 'pit bulls' account for about 60% of dog bite deaths.
Which of the breeds listed in my post above are included in the studies on 'pit bull' deaths in addition to the American Pit Bull?
Hint: They never tell you.