The dog botherers always insist the dog attacks are due to "bad owners". And that presumptively "good owners" will never have a dog that attacks or kills anyone.
We'll leave aside their denialism about their own doggy's noninjurious but threatening behavior and the inherent circularity of their argument for now.
The interesting point is what it takes to be a "good" owner. You have to train and "socialize" the dog. Control it. Keep it in the right circumstances. Train toddlers how to "approach it properly". Leash it. Lock the gate. Etc. never let down your vigilance for one little second.
What is all of this but a frank admission that these alleged domesticated animals are INHERENTLY dangerous to other citizens? If they weren't, the only problem would be "bad owners" who actively train the dog to aggress.