No, actually they were bred to fight dogs. Their sole purpose.
So how are those other dogs going to beat the dog at it's purpose.
Wrong
These dogs (named Bull and Terriers) were bred in the British Isles, and arrived in the United States where they became the direct ancestors of the American Pit Bull Terrier. In the United Kingdom, Bull-and-terriers were used in bloodsports such as bull baiting, bear baiting
American Pit Bull Terrier - Wikipedia