You missed the point. You’re basing your assumption on the idea that pit bulls are somehow inherently bad dogs kind of like society treats people of a certain color as if they are inherently criminals.
The CDC and Humane society are saying that’s an incorrect and poorly supported approach. That’s why they don’t support breed specific bans.
That’s not to say dog attacks don’t happen. Dogs of any breed can be aggressive. It depends on a lot of factors.