no - that's rubbish. I own three different breeds, pedigrees, all bred to do a specific job.
The terriers are bred as ratters, and they are great at it, one shake and dead rat, the retrievers are bred to gently bring something back to you - rubbish with rats, might catch one, but no idea what to do with it, no killer instinct, my golden just drops it and the terrier grabs and shakes.
my retrievers were bringing things to me as pups without being taught, my terriers had to be taught to let got of something "precious".
Dogs do better in situations where you work with their instincts not against them - so police drug detection dogs are more likely to be spaniels/retrievers not the Shepherds who are used in active chase and detain situations. There is a reason you don't see Golden retrievers being deployed to detain a fleeing burglar 😆🤷🏼♀️
We've bred different dogs for different purposes, if you have a dog breed that was DESIGNED to chase, kill, defend, tackle large prey, then that is what it will instinctively do.
Rotties were bred as livestock guarding dogs, so they can be territorial, that doesn't make them bad family pets, but it's a trait you have to manage. I've known some nice staffies, but personally I would never have any of the breeds that are in that bull terrier "family".