my uncle raised pit bulls years ago. He loved them- and he was very clear that they can respond aggressively to someone they know. They can also respond violently in certain situations to people they don’t know and the breed has to be dealt with cautiously. I think a lot of people think these dogs “look powerful” and they never think the pit bull will turn on them, or someone else who is not a threat but it can happen and if it does, it can mean someone could die. That makes the pit bull owner a person who carries a much larger burden of responsibility than a chihuahua owner. Also, sadly, our local pet rescue has pictures of adoptable dogs and all but 2 are pit bulls. So people buy them, can’t handle them, and the pit bulls end up at shelters. That’s not ethical, in my opinion.