Yeah it's odd but me and a friend had a discussion on it. By reading the books the raptors were actually raised by the people working at the park but at a certain age they became rather aggressive so they then took them and put them in their exhibit. So perhaps now they have finally found a means of some kind of domestication of the raptors similar to how wolves were domesticated into dogs but rather then taking centuries to breed traits and other things they did through genetics. If they can make an entirely new dinosaur through genetics they probably could do such a thing just as easily.