Nobody is blaming the dogs. The humans that bred then to have the instinct to never let go until their prey is dead, they are the bad guys here. It’s a bit like how pugs are fraught with health problems their whole lives because people think their funny faces are cute. Not their fault, but they have to live with it. XL bullies aren’t evil. They’re just doing what their breed does. Unfortunately what their breed does ends up killing people quite often.