If they hadn't, human evolution wouldn't have taken with the survival of the fittest. I'm happy that technology cen tell us if our baby is gonna be autistic. I've heard about, and met people with a VERY autistic kid. I am one very mildy, but these kids scream in frustration every day, and I feel just as much for their parents as I do for them.
I don't do good with general stress, so I's def kill my poor child