Many people said that "Why should there be physical treatment if there's magic that can heal everything. If you've got a disease, heal up. If you've got an open wound, heal up. It's like nothing happened."
But fact is people! That some characters now have scars and wounds, we even saw some half blind ones!
If magic can heal everything, how come these people are crippled? haha!
I think we can sum it up to the fact that there should be physical treatment like bandages and healing methods besides magic, because clearly magic doesn't heal everything!