Listen to boogie's stories on Youtube. It is NOT easy, at all, and the real difficulty is not as much physical, as it is psychological. It is not just food addiction, the problem is much deeper, it is caused by countless factors piling up.
It's weird to me that people who have never had the obesity problem like to say how easy it is to drop weight. It is the same as some people who have never smoked say, "Giving up smoking is easy: just stop buying cigarettes". If things were that simple, then we would all be billionaires with perfect health; there would never be wars and any problems at all in our lives. Unfortunately, the reality is a bit more complicated, and simple "do it and that, and your problems will be solved" does not work more often than it does.