Why does Vince McMahon dislike wrestlers from the Independent scene?

I have noticed that the WWE seems to have no respect for wrestlers that come from the independent scene. Why is that? Vince only wants his useless farm grown, FCW talents. Just look at how unspeakably awful the NXT guys are in the ring. Every time a wrestler comes in, or tries to, from the independent scene they are done away with almost immediately. Look at how Daniel Bryan has been buried and made to be a constant jobber in the WWE. I can't remember any indy wrestler making it in the WWE. Earlier tonight on Tough Enough the only independent scene wrestler was eliminated from the contest in favor of the typical guy with long blonde hair who has no experience of any kind in the ring and has no actual knowledge of wrestling what so ever. Why is this? Now we are going to get stuck with another no talent nobody getting trained in the worthless FCW, which has produced nothing worthwhile in wrestling. Why does the WWE hate indy scene wrestlers so much?