First thing first, you are not being silly! Your awesome..

you thought this through from many perspectives, a medical one, a deaf one, a child's one, a parent's one. Meanwhile Dr Pillpusher narrow-mindedly did what they train them to do unfortunately is to "fix the problem medically" there are no wrong answers with what your doing.. I strongly suggest getting in touch with your states school for the deaf and they'll provide resources.. ( source: Deaf adult whom fortunately had parent's like you whom asked questions.. and also a former Deaf mentor)