You need to read between the lines more. You look at one aspect when there are many all the time. Look at the diet. Lets add this up.
2 whole eggs and 15 egg whites - literally nothing barely a snack
3 slices of turkey bacon

1 1/4 cup Ezekiel cereal
160-carb blueberry bagel
that's breakfast, would stop you feeling hungry not much else. We are talking a small omlette with a small bun and a bowl of cereal here
280g ground beef
1/2 cup chopped onions Garlic & herb seasoning to taste
2 cups brown rice
Basically a small chili. 2 cups of rice is a lot of food but not calorie dense at all. This is fuck all calories
280g ground chicken
140g pasta
1/2 cup Parmesan cheese, shredded
1 cup tomato sauce
with the meal above this would be a typical lunch for most people
280g steak
1/2 cup chopped onions
1/2 cup chopped peppers
Garlic, to taste
2 cups brown rice
Again, this is nothing, small meal.
Can't be bothered with the rest, thjere is basically 3 large meals here, it's just food low in calories. On Sunday I will take pics of what I eat, add it all up. Cutler eats a lot of volume but it's all low calories. Simply switching the beef and chicken for lamb or pork and the carbs to oats would double the calories. Most of his "calories" comes from the stuff that goes down easy like the 100g of pure sugar he drinks and the lemonade