Special attention must be given to evaluating the morality of prenatal diagnostic techniques which enable the early detection of possible anomalies in the unborn child. In view of the complexity of these techniques, an accurate and systematic moral judgment is necessary. When they do not involve disproportionate risks for the child and the mother, and are meant to make possible early therapy or even to favour a seren…
This may be controversial, but I don't believe an unborn fetus has any inherent value outside of whatever feelings of hope and excitement it elicits in the parents. If those feelings are instead of dread and anguish, it should be terminated for the benefit of all. The quote seems to imply there is value in the suffering of a disabled child and its parents - suffering for its own sake - which is absolutely horrific.
I think it would be more accurate to say that the quote is asserting that human life has great value _regardless_ of the amount of suffering involved. (Or put another way, the total value of someone's life is not a function of the amount of suffering they experience.) Certainly this is a challenging worldview since naturally everyone wants to avoid suffering (or at least avoid suffering that does not help them achieve some goal). But at the same time it is hard to make the general assertion that people who have suffered greatly would have been better of not existing.
I am reminded of the story about Johannes Steinhoff [1], a German fighter pilot in WWII. Apparently after witnessing another pilot die horribly in a fire, he asked his friend to just kill him quickly if he ever ended up in a similar situation. As it turns out, Johannes was later a victim of a terrible explosion (even his eyelids were burned off). His friend literally drove to the hospital to shoot him and put him out of his misery, but was prevented from doing so by the medical staff. Johannes ended up recovering and went on to become a key player in the post-war German Air Force and the German Military Representative to the NATO Military Committee.
I don't quite know what to think of this story because on one hand I would not wish his ordeal on my worst enemy. But, on the other hand, it is hard to say that anyone would have been "better off" if his friend had killed him. Life is often what we choose to make of it and it is impossible to avoid all suffering. It seems like the best we can do is play the hand that we are dealt and try to regard all things outside of our control with equanimity.