as
It is the Christmas season, right? So it is ok to wish for things. I too know we will never have a population without "defective" children being born and I certainly do not think of those children as being horrible. You are right, they can do wonderful things and are a credit to mankind. Still, what is bad about wishing that children are not born that way? All parents want a "perfect" child and that does not always happen, rare so. And all parents I know are acceptance of their child and give that child a ton of love. Nevertheless, if you were to give prospective parents a chance to pick eye color, height, complexion, etc. that, to me, is somewhere far off. On the other hand, if you would offer them a choice of "defective" or "non-defective" child I'm 100% sure you and everyone will know their choice.
BTW: don't jump on me for using your word to describe the children. I know many deaf children here in Houston and love them all equally. Nevertheless, I stol say wish for the impossible, that no child is born deaf