What's the problem with free feeding?

As long as you don't give your dog unlimited access to food, why do you have to pick it up after 15 minutes and starve them for the next 8 or so hours? This makes no sense to me. What is the point of starving your dog? I know if someone took my food before I was done with it and wouldn't let me have a single bite of anything else for 8 hours I would be pissed. So what is the thinking behind starving your dog? All I can think of is it's a way to assert your dominance over them by controlling their food.