What is wrong with voice too. Hey, I am a deaf individual, why should you tell me that I must learn sign. I would never tell you, you must learn to speak or lipread. My choice and my parents choice, it is wrong for you to tell them they must learn sign. There are many reasons and unless you know the family and choices, then you don't know why.
Vallee, I see your point and I know what you are saying. However, I think one thing that has been over looked is the deaf vs. Deaf divide. Some Deaf people, still feel betrayed by CIs. They are effectively removing members of our community and our culture.
I'm bilingual and I have both cultures and languages. You need to realize that this issue reaches beyond language and goes as far as genocide in some peoples minds. While some oral deaf people look down upon sign language and Deaf culture it is not with the same feeling of betrayal, rather it stems from pity - not a feeling of disrespect for a culture.
I do understand your point, but it is totally different in reverse.