I’m not sure if I understand what you’re saying? Why are pit bulls selected for dog fighting? Well, that’s what Pit Bulls were bred to do much like Collies were bred to herd, Wolfhounds were bred to hunt and Doberman Pinschers were bred to protect. Dog fighting has been around as long as people have been around.
As another poster mentioned, however, it’s a mistake to conflate dog aggression with people aggression. The two are very different. Just because a dog is dog-aggressive does not mean it will be people-aggressive. This is especially true for pit bulls. When you have two dogs fighting you must be able to separate them. It would be a difficult task to separate two dogs willing and able to bite a human being. Therefore, Pit Bulls have historically been bred to be as people friendly as possible. IMHO, it is a behavior etched into them as deeply as a border collie’s instinctual reaction when it sees sheep.
This isn’t to say that some Pit Bulls aren’t people aggressive. If you treat a dog badly, if you don’t socialize it and if you don’t train it, you are going to run into problems. This can be said about any other dog, however, if I had to deal with a dog that wasn’t trained, wasn’t socialized and was treated badly, I would take a pit bull over any other dog because of its propensity to be human friendly.
Just as a reference, this is what happened with Michael Vick’s dogs:
http://sportsillustrated.cnn.com/2008/magazine/12/22/vick.dogs/index.html
“In the end, 47 of the 51 Vick dogs were saved. (Two died while in the shelters; one was destroyed because it was too violent; and another was euthanized for medical reasons.) Twenty-two dogs went to Best Friends, where McMillan and his staff chart their emotional state daily; almost all show steady improvement in categories such as calmness, sociability and happiness. McMillan believes 17 of the dogs will eventually be adopted, and applicants are being screened for the first of those. The other 25 have been spread around the country; the biggest group, 10, went to California with BAD RAP. Fourteen of the 25 have been placed in permanent homes, and the rest are in foster care.”
The key word, IMHO, is “seem.” There is a lot of bad reportage when it comes to Pit Bulsl. Fear mongering and moral panics sell papers. Just as people loved to read about non-existent needles in Halloween candy so do people love to read about a vivd Pit Bull attack. The problem is whether these reports actually involve a Pit Bull or Pit Bull mix. I would urge you to read the thread I cited. NajaNivea, the thread starter, goes into great detail of what a poor job (and outright damage) newspapers do/have done on this subject.
If you’re really interested, I would also recommend two books. One I’ve mentioned repeatedly. “Bandit” by Vicki Hearne. It’s a very thorough and well-researched book on the fear mongering surroundings Pit Bulls . I know Czarcasm doesn’t like the book but he hasn’t attempted to disprove her research so make of that what you will. Additionally, I would recommend “Folk Devils and Moral Panics” by Stanley Cohen. It doesn’t discuss Pit Bulls but does analyse how, why and what is a moral panic and I believe his research can be applied to the subject at hand.