You do realize networks compete against each other for ratings, right? If there was one network there wouldn't be any competition. It doesn't mean that they couldn't be regulated.
How does the lack of competition provide for more accurate, reputable, and reliable information?
It may be wishful thinking but that doesn't mean we have to just give up. There will continue to be evil acts in the world too, despite our best efforts, but that doesn't mean we just give up and make matters worse by not trying to alleviate those problems?
I'm sorry but I don't understand what you are trying to get at.