If they were nanny dogs why do dog fighters prefer them?

Most everyone on this sub knows nanny dog isn’t a real thing. Everyone knows pitts are used for dog fights. How can people continue to say it’s how you train them, they’re nanny dogs etc…if you didn’t know the history of the breed how could you over look the fact that they’re THE dog breed people use to fight. People will say not to surrender your pit because dog fighters will get them from shelters. Why hasn’t any Pitt owner paused to wonder why dog fighters prefer these dogs?