People are still looking for a genetic link to autism.
I can see how if we, as society, - gain such immense wealth that taking care of/ providing support to/ humans with DS becomes so easy - arrive to the conclusion that there is no downside in emotional health/wellbeing - change definition of what “living full/happy life” Then parents stop perceiving DS as a concern
A novel therapy that does not result in the termination of the pregnancy might satisfy the conservatives, but it does nothing to satisfy the disability advocates, who point out that these kinds of technologies fundamentally normalize the idea that they should never have been born the way that they are.
I have no moral problem with a therapeutic intervention that improves a life by treating a debilitating disorder with no cost of life.
I will have moral problems when those ideals are inevitably twisted and loosened over time to not just treat disorders, but pick attributes like intelligence, strength, skin color, attractiveness, etc.
One can value/respect people with DS and strive to eliminate DS at the same time.