Golden by vs. Top Rank

In this era so many fights have not come to fruition due to promotional conflict, no need to mention the fights as we are all well aware. My question is why are the big television networks puppets to these promotional companies, surly they have the resources to cut out these middle men and do everything in-house. I know this method could cause the same thing with various networks, but I do feel they would pit their fighters against one another in split promotions and some sort of deal could be worked out as they are all about making money and not so worried about putting money in their competitors pockets especially if they are lining their own at the same time. I would like to know people’s opinions on this, I was told ESPN tried this but was way before my time, would be interested in knowing others thought on this and the positive and negative things that could come from such a structure. Mark Leroy, Kilwinning OH