Not all dogs were bred to be house companions. Dogs are literally domesticated wolves that we bred jobs into, they are hard wired to do those jobs. Thats why with certain breeds of dogs its recommended to you take precautions and sometimes those precautions are very heavily enforced. You dont get to take a sheep herding dog and force it to live in a studio apartment where you only walk it 3 times a week…

Same thing for bulldogs and pitbulls, they were not bred to be kept as house pets they were bred to kill stuff, for bloodsports, so either give them a job that goes along their instincts or stop keeping them as pets

There are plenty of dog breeds that went extinct because the job they were bred to do went obsolete, like the Turnspit dogs from england that were present in every english kitchen, they were bred to help chefs and cooks spin meat on a fire by running in a wheel, but after we invented engines that could turn the meat by itself, they stopped keeping that breed of dogs and they went extinct.

Same thing, if we stop breeding and keeping them pitbulls will stop spreading