As far as I know, it's done for aesthetics. The AKC requires it of certain breeds if they are to be shown, so some people do it to get the "popular" or "standard" look for the dog.
My opinion is that if it's not medically necessary, don't do it. Any surgical procedure will create stress, pain and potential for infection for your dog. To me, a dog's health far outweighs the look.
It also sounds like a lot of work. This link (click here) details how much commitment is required of the owner post-op to make sure the look stays. Maybe showing your husband that link will change his mind ;)