Well, cystic fibrosis patients are encouraged not to have children. Is that eugenics? In the extreme, with enough time and money we could even harvest eggs and sperm from CF patients to ensure they can procreate even if they don't live long enough to do so. Is it eugenics to not spend those resources?
It's a pretty big gap between "don't treat preemies who might be perfectly normal once stabilized" (case in point: my kids) and "you should think about not giving a kid a death sentence" that CF entails.
