I've come around to this spartan view in recent years. Someone has to stand up for the good-hearted people who are too kind to look out for themselves.
Special needs kids are a HUGE, EXPENSIVE, LABOR-INTENSIVE PROJECT THAT NEVER ENDS. It's one thing to decry a poor baby being killed off, but nobody ever has that empathy for the mom with her 35 year-old "miracle baby" who just smashed diarrhea into the carpet at 3 AM- and nobody in the family or community ever taps in to give her a break from that duty. A constant string of injuries, messes, and work that nobody wants to do. They're on 24/7 home-care duty their whole life without end, because the rest of the family wants nothing to do with the hassle.
Wanting more kids is all well and good, but I can't advocate for keeping all our gimpy, unworkable people alive, especially in an era where you really can't afford it. Most of the time it's a lifelong curse set upon a family at the behest of one or two sentimentally-blinded people. It's horrible to say that euthanisia is freeing to the living, so nobody ever stands up for those kind, dutiful, good-hearted people that ACTUALLY clean up and care for the cripples/"special" kids, etc.
Caring for the special needs people is completely thankless, and tiresome, and they hate it, and they're racked with guilt every day because they sit there, aching back and arthritic knuckles, scrapping away the 5th floor-shit of the week thinking to themselves "I can't wait until God takes him from us, I can't keep doing this... I'm such a horrible person."