Not to downplay your situation, but this is Down's syndrome we're talking about, so a whole menagerie of both physical and mental conditions, including, but not

Not to downplay your situation, but this is Down's syndrome we're talking about, so a whole menagerie of both physical and mental conditions, including, but not limited to: higher risk of epilepsy and heart failure, aside from almost universal infertility in men. It's a serious disability even today decreasing life expectancy by 10-15 years. One may have different opinions regarding the quality of life of these people while they're alive, but I think we can agree that 60 years is a short lifespan for a human. EDIT: also main point of eugenics, which seems to be not widely understood, was that the state would decide both what kind of children are born and who gets to have them. It was not unheard of to take sufficiently "aryan"-looking newborns from their "inferior race" parents and give them to "master race" adoptive parents. This lack of agency on part of biological parents is a core tenet of eugenics.