I guess there is no such thing as bad people, only bad parents You could be lifting weights for 15 years also and it does not make you an expert. IMO the risk of having these mutts around far outweigh the benefits.
So if I'm not an expert after breeding and raising them for 15 years, what are you? You have never owned one, so you don't know what the risks or benefits are. If I'm not an expert and I have infinitely more experience than you do with this, what makes you qualified to have an opinion about it?
They are stupid animals - they attack if you show them your teeth. Also the fact that it is an animal means we dont have a clue what it is thinking.Look at that chimp that mauled that lady. 100x smarter than a silly dog. Yet it went beserk for no good reason.