the reason people think they need to eat so much is because they try and copy what pro bodybuilders eat.
what they don't realize is they aren't using the drugs, steroids, hgh, insulin, working out as much, and most important of all the GENETICS
you follow what Ronnie Coleman eats everyday, you will just get fat. this is why you see so many perma bulkers at the gym. they think that eating chicken 8X a day will make them a pro.