[Steer]

I think the point OP is trying to make is that it is very easy to eat in excess (calorie-wise) to what you are burning by training since physical activity will often make you crave more food. Doing some kind of training is obviously good for you, but you will not necessarily lose weight if you don't restrict your caloric intake.

Just like intelligence differs, your ability to gain or lose weight is not the same as other peoples'. In my experience it is not fair, but on the other hand, what is?

I would recommend something like the slow carb diet (Tim Ferriss), but anything that restrict your intake of calories and that you feel you can sustain over a long period of time is good.