My first after school job was walking a kennel of pits, they were all very people friendly and most were good with other dogs although I never let them run with strange dogs. I have been training manwork dogs(GSD's, rotties, malinois, collies, labs, bouviers, pointers etc etc) for years and 99.99% of these dogs could be handled by anybody. I worry about BSL as its the owners fault most of the time for choosing and keeping an unsuitable breed in the majority of bite cases.
I cannot imagine how the family of the baby are feeling