First off….of course you can if you want to! But the reasoning behind slowly adding in calories each week is because when you spike your caloric intake too quickly at the end of calorie deficit, your metabolic rate doesn’t have time to catch up to the change. The reason for this is our metabolism adapts to the amount of energy we give it. For example, if you have been in a calorie deficit at 1565 calories, at a certain point your metabolism will slow to match that 1565. In order to slowly adapt your metabolism to the new intake of food, you want to slowly add in calories each week.