Scary picture there!
Are they powerful, muscular dogs capable of injuring people? Yes, along with many other breeds. The desire to do so isn't present in one that isn't raised to behave that way nor deliberately bred for agressive traits.
Some of the most beloved dogs in the country, historically, have been so-called "Pit Bulls," but weren't called that at the time. Victor, the RCA mascot. Petey, the faithful dog to all those little rascals on Our Gang. The breed being regarded as some sort of monster is a recent invention.