We were learning about this in school. I’d imagine the majority said they wouldn’t do this, but there’s definitely some who thinks it’s a good idea (like my uncle, ahem ahem).
But if you had the option to mess with genes and give you the “perfect” baby and you knew what they would look like beforehand, would you do it? You could give your child “desirable” traits while the children who don’t have those traits are inferior, or you could love your child considered “inferior” by society as they are.
Children are fun because they’re unique and a surprise IMO. I wouldn’t want to decide everything about one myself. But I would want to prevent a child from having a disease that would ruin their life.