This is exactly the anti gun argument; Ban them! They kill!
The simple fact is that if pit bulls were anywhere near as dangerous, given their numbers, same as the massive number of guns in private hands in this nation, there would be blood in the streets, dozens, maybe 100's, in SOMD alone, every single day.
There is not. How can this be if pits are these murderous, hi capacity, uncontrollable, scary looking things? Like the rather rare mass murder, a pit mauling grandma to death is RARE. That makes it no less horrible but, using the same argument as anti second amendment types isn't helpful.
Of course, a pit is not a gun but, it is not far from it and like a gun, it is subject to misuse. The Four Rules of Gun Safety address the uncontrollable part of shooting; what happens after you let a round go. If handled properly, an assault weapon is no more dangerous than a stapler. If handled properly, same thing goes for pits.
Let's focus, please, on the humans and not hunks of steel or an animal. There should be a LOT less pits in private hands not because they are dangerous but, because MOST people do not have the appropriate environment for them. Focusing on those issues is more productive. Focusing on what a pit CAN do is exactly like focusing on what a scary looking rifle can do.