Yes, I understand what you are saying, no doubt about that. And that’s true, what you are inside is what counts.
I love it when you wrote a perfect picture of a child but that illusion is shattered by the sign-language so that’s where the hearing either have to accept the imperfections or not, by realizing we're the same as everybody with emotions, except for our 'broken' ears.
The Deaf have been misunderstood for donkey’s years and I feel that will never change. It’s like hitting your head on a brick wall!
It would be a long and hard road in bridging the gap with the Deaf and hearing in terms of ignorance. If you want to do that, by all means, do so!
Your brief story would be an excellent one to be printed out to various sources for the hearing to read.