It isn't multiple students, it is multiple assignments for one student. If I have a student come in the middle of the semester, I have to excuse everything they weren't present for. It is easier to open their name and to click each assignment I would want excused. Also, if a student was out sick and the due date is past, how to open multiple assignments for that one student to allow retry without clicking each assignment. It again would be easier to click on that student and see their gradebook to see the dates again and just click retry on the ones I want to open.