Meh, low carbing isn’t the ONLY way to diet, although probably the most effective one. The “weight gain” calories dont see too far off from what CT prescribed in his article about bulking.
If weight loss man was doing two workout sessions a day or an extremely long one, that sort of carbohydrate intake may be justified if he handles carbohydrates better than most people.
Most people do better on half that amount with the rest of the calories being made up with fat and protein to compensate for the lower carbohydrate levels.