Your approach works too. Again, it s calories in, calories expended. Whichever program you can stick with will work. I can assure you of that. The pictures he shows you are of successes.
Many people also fail.
Don t be seduced into thinking it s magic. It s not. I think it s a good program, but it s not for everyone, and it is certainly not the only answer out there. I know you want to lose weight, and you want the best there is to get there. The answer is that any program that reduces the calories consumed and helps you expend calories through activity will help you lose weight.