Haha, I'm sorry but this is hilariously false. All other working-dog breeds have genetically ingrained behaviours that no one teachers them - retrievers retrieve without anyone teaching them, border collies corral ducks and children without anyone teaching them, pointers point without anyone teaching them.
However pitbulls are always the odd one out in the apologists' eyes - somehow them being purposefully bred for fighting bulls, rats and dogs and having behaviour and features that would make them successful in these pursuits is nothing to do with genetics and everything to do with their owners. Despite there being many cases of pits being adopted by very kind and caring owners and the dog still mauling them.