Nothing throws this into a grey area as much as deafness. Deaf culture is truly profound. Entire vibrant deaf communities exist within 'normal' communities and can interact with others on an equal basis.

On the flip side, it can be seen as offensive to others when medical options become available to restore hearing. People will sometimes forgo treatment to 'stay in the clique'. This strong desire to not see deafness as a disability and an independent thriving culture is what might influence the choice to have a deaf child.

And while I'm being all stereotypical, if you ever have a Final Cut Pro question and you have a choice between asking a deaf or a hearing person, choose the deaf person....