Or, return to the breed standards of 100 years ago. Humans have created genetically weak inbreeds incapable of survival without human intervention. Many modern breeds have trouble walking, giving birth and even breathing. 
Discussion
Yes, except those that were breed for fighting.
My basic assertion is that some of these dogs have been poorly bred into compromising health, which could potentially be fixed, however a dog like a pitbull has no other job but fighting., and I bet if you breed their aggression towards humans out of them that they'd essentially become a different breed
https://en.m.wikipedia.org/wiki/American_Pit_Bull_Terrier#cite_note-CDC-33
They were brees for blood sports that society no longer considers valuable and so their breed should have the same fate.
Sure, you versus her.
Make it fair, hand to hand combat?
My rottie will just sit and watch
I'm not saying any living dogs should be killed, just that they should be sterilized as a whole, 100%
People who like these modern freakshow breeds are best avoided. Their emotional depth matches the caricature of the animal versus the wild genetics