Let’s say that here is magic land a cure for Down’s Syndrome has appeared. If it is used on a person with Down’s Syndrome, regardless of type or severity, they become a neuro-typical person with above average intelligence.
You are a parent. Your child has Down’s Syndrome - do you “magically” cure it? Your child won’t be the same child exactly afterwards - their personality might change, who knows? Not all children with Down’s Syndrome are equally disabled. Not all children with Down’s Syndrome want the same things. Some children with Down’s Syndrome grow up to adults who accept that Down’s Syndrome is part of who they are, who believe it’s important, that it offers them abilities and insights that neuro-typical people don’t have.
You’re the parent. Your infant, 3 y.o., 8 y.o. has just been diagnosed with Down Syndrome (here in hypothetical land) - do you magically cure it? Why or why not?