Have you ever worked with children or adults that have Downs Syndrome or cerebral palsy?
Worked? No. Lived? Yes. My brother has cerebral palsy. I'll admit that he is very lucky; he's of average intelligence, less severe physical handicaps (he goes to the US paralympic soccer training camp about every six months and gets to travel the world that bastard). It's not all sunshine and rainbows (medical bills, being different), still he's the nicest, happiest guy I know.
I'm not naive enough to think that if I had a child with this disorder, I would be so lucky to have a kid that "normal". I know that people have very good reasons for aborting fetuses with disorders, and I still totally support their decision. I would abort if I thought the disorder was major and I didn't think I could give my child a good quality of life. But I wouldn't for just any disorder. It's naive to think that I could understand all the difficulties of caring for a child with special needs, yes, but I'm not trying to pass judgment on anybody who chooses to do something different.