His argument is that because calories in/out doesn't work mathematically, the theory is false.
What he misses is that calories in/out is more like the Demand Curve in Economics.
If Apple were to raise the price of IPhones by 10%, you can't say for sure what the effect will be, but if Apple continues to do this on a weekly basis, demand for IPhones will eventually fall.
Same with calories. If you increase your caloric intake by 10% each week, eventually you will be a fat fvck.
Sorry, in the end it comes down to discipline, no matter what these dietary gurus say.