I suspect that in part the problem is the type of people who want to own pit bulls are — to a greater extent than owners of poodles, say — the type of person to mistreat their dogs, causing the dogs to become overly aggressive.
I had a classmate in high school (loosely say that, being he was kicked out junior year) that was into drugs… and when I say drugs, weed was the bigger thing at that time (he supplied a good chunk of the school, and while heavier stuff was around, it wasn’t the norm). He didn’t want people messing around with his supply that he would have in a shed, so he “trained” his pit bull to be aggressive.
Forget the situation, want to say he got in a fight with his father… but two local cops roll up on his house. He denied it, but knowing one of the officers, he opened the door and commanded the dog to attack (I believe it). Dog got lit up with multiple .40 rounds.
Local news portrayed him crying, saying how the bad police shot his poor dog… which I was disgusted with. Same idiot stole a car from Walmart, got on a chase with multiple agencies for 20-25 miles… rolls the car, gets out to run down the Parkway… and gets hit by another car. Just perspective of the outstanding individual I’m mentioning.
Would I have shot that dog in the same situation? Yes, without hesitation. But again, it isn’t the breed… it is the people that want a “mean dog” or just really shouldn’t have a dog at all.
I have a lab and a German Shorthair Pointer… neither would ever attack a person unless they were hurting myself or a loved one. I can say that with zero hesitation, being I trained my dogs correctly. But even though those two breeds are not considered aggressive… I can guarantee that a terrible owner could get either of them to a similar point where they could do damage. It isn’t just the breed.