College Meal Plans - When does it make sense to buy the "Maximum" plan?

At my daughter’s school unless you lived in apartments with full kitchens you have to have a meal plan with 9, 13, or 19 meals swipes a week. The difference is the 9 has $200 in extra bucks, 13 has $150 and 19 had $100. Pricewise they are all identical and the places that you can use the extra bucks also take swipes. My daughter just sticks with the 19 even though she has probably never used all 19 swipes. It doesn’t really make sense to me that the meal plans are all the same price.