I think one thing that these people who say you should "be praying for a miracle of healing" is that, especially if one is born deaf, if that person became hearing at a late age, he/she would have to learn SOOO much!
There are nuances so MANY nuances in spoken language, plus all the environmental sounds, plus the fact that if you could hear people would expect you to be just like a hearing person.
I hate comparing blindness and deafness, but there are many blind people who don't want to see, a huge part of that being because of how much they would have to learn! If anyone has seen "At First Sight" they will know what I mean about how much people who live without a sense have to learn to keep up, and about the expectations "normal" people would have for them.
Going back, it shocks so many people that most deaf people want to be deaf, but... I think gaining hearing after many years of being deaf would be just as dramatic as losing it after being fully hearing.