As I've said elsewhere on this thread, the first-order consideration for breeds is just the physical capability; temperament and training are second-order considerations that may mitigate some of the capabilities, but rarely will increase the danger of a breed.
Wot?
Here's a quick google result to the contrary: https://www.independent.co.uk/life-style/health-and-families...
They can absolutely kill a small child.
https://www.washingtonpost.com/archive/local/2002/12/27/dach...
At a minimum you are talking about dogs that are capable of killing a child and seriously injuring an adult, and when we talk about the larger breeds in the pit bull family, clearly capable of killing an adult.
Some larger breeds, like golden retrievers, can be ferocious when provoked, and can be dangerous in this regard, but in terms of brute strength are more limited. This is even putting aside differences in temperament.
BSL works because it is also based on probabilities, specifically the probability that a group of closely related dog breeds are all likely to exhibit the same behaviour.
The problem with pit bull type dogs is the breeding that makes them attack a target’s most sensitive region - the neck. Better to have all related breeds removed that run the risk of yet another child dying because someone could not be arsed to contrôle their dog.
A threatening person I have little doubt she would have a go at.