I think you should be a bit more open minded and critical. The point is that the energy required for exercise has been over emphasised and the relationship between calorie estimates and the energy that a person gets from that food is not linear. Therefore "fewer in than out" can end up meaning that you gain body fat rather than get rid of it. Conversely if you simply change the type of food (to unprocessed and uncooked) then your calories and exercise can remain static while you start losing body fat.