There are plenty of ways to lose weight. Cutting calories is a very effective way of losing weight.
This doesn't discount the fact that cutting carbs also works. In my case, it has been working spectacularly. I believe that I don't need to cut calories or cut the amount of food I eat, and still lose weight, by choosing food that is very low in carbs. I limit myself to 1 granola bar per day, plus whatever incidental amounts of carbs I eat through other means, and I've been able to lose a lot of weight in a short period of time. I don't overeat meat or fat, I eat the same diet, just a lot less carbs.
This doesn't discount the fact that cutting carbs also works. In my case, it has been working spectacularly. I believe that I don't need to cut calories or cut the amount of food I eat, and still lose weight, by choosing food that is very low in carbs. I limit myself to 1 granola bar per day, plus whatever incidental amounts of carbs I eat through other means, and I've been able to lose a lot of weight in a short period of time. I don't overeat meat or fat, I eat the same diet, just a lot less carbs.