Your statement is the equivalent of saying its a heroin junkies own fault: Technically true but useless. It also has many parallels in the way you grew up, differing genetics, etc.

If it were just a matter of willpower or simply eating less then I would already be my ideal weight. It isn't that simple. You can't detox off food and quit eating. At least a drug addict doesn't have to take just the /right/ amount of the drug every day to stay healthy!

The drive to eat is one of the most basic instincts. Evolution has created signals and feedback mechanisms far more powerful than our puny frontal lobes. The problem of too much food has simply never existed before. Fruit eventually falls to the ground and rots. During winter food becomes scarce. Excess food is consumed by other animals. For our entire evolutionary history the correct long-term survival move was to eat while the eatin' was good because there was definitely going to be some kind of lean time ahead.

The only simple or easy part of losing weight was cutting out sugared soda. That dropped 30 lbs. The rest was a slog and using various techniques to trick my body (like eating a large meal before going to the grocery store so I wouldn't buy anything outside my meal plan). It also involved lots of extremely strong urges to eat more and hunger pains. I have to think about what I eat every day and no matter what I do I will never be my ideal weight. Internal or external, this is a battle a lot of people just never face. They just eat when they are hungry and stop when they feel full. Of course their myopic view says it's just "calories in, calories out" (which the research has already proven is false... Some people gain more weight on the same calories).