No, the GP is correct and "calories consumed >> calories burned" is a gross oversimplification. For example, one extra Oreo cookie a day ends up in several pounds gained over a year. Tiny changes in net calories can have very large effects in equilibrium weight. In addition, it is so easy to say "just eat less", but it is very (very) well documented that some overweight people can eat less and lose weight, but they are looking at being extremely hungry every second for the rest of their lives. Once a weight set point has been established, your body can scream at you forever until you regain that weight setting. So easy for "normal" weight people to say "Just eat less".