I wasn’t ‘hanging’ with them.
I dated a woman whose brother owned a Staffordshire Terrier (a Pitbull with papers); he too never growled at anybody and was a big sweet heart. But his owner, unlike many Pitbull owners, acknowledged that he had a great potential for violence, even without the demonstrated propensity; and took steps to prevent any attacks.
Much like the parent whose kid can do no wrong is most likely to raise a brat. It is the Pitbull owner who thinks “My sweetiekins would never hurt ANYBODY” who is the most likely to have a dog that attacks someone; and their response is “NEVER! It must have been provoked!”. That is because they are morons.
Any dog owner who thinks there dog can never do things that dogs do shouldn’t have a dog of any sort.