Let's put it this way: the networks don't have any control over a large portion of the time period known as "Daytime." The hours they don't have control over are generally taken up by talk shows, such as those mentioned above, that are bought by the affiliates. If the networks tried to take back these hours, the affiliates would crucify them, because that's where they get a lot of their money. That leaves nearly nothing but soap to replace with game shows -- and if they took those off, the viewers would crucify them.
In short, this is nowhere near as simple a subject as you're trying to make it.