Propose of the head band post otoplasty? If I don't wear it, will my ears shape change?

Hi, I'd like to know the propose of the head band post otoplasty is recommended at night for 2 months. I was told that it would help to shape the ears, but hasn't the shape already been determined by the surgery and sutures? I was initially given to understand that the band was just to protect the ears from moisture and pulling. So if I don't wear It (I feel ok without it, and sleep alone) , will the shape change?