I understand very well. I’ve been downvoted to the ninth inferno for stating as much. Breeding is absolutely important in a dog’s temperament and behavior. My labs retrieve and live for a splash in the lake (especially after a downed duck). My Bernese mountain dog wants to be at my feet at all times and loves to be a goofy, playful companion. Hundreds of years of selective breeding produces outcomes

They’re too violent for hunting anything besides feral pigs; look up “hog-dogging.” They were bred fro bear-baiting and bull-baiting and other pit fights (hence the “pit” and “bull”). These were despicably gory events. When the pit-baiting entertainment fell out of fancy in Europe and North America, dog-fighting became the hustle for the beer-shwilling after hours ruffians. The pit breeds were further refined for effective killing. It really blows my mind that they could ever be marketed as family pets when their entire pedigree is built on blood lust.