Maybe this is just an ex post vs. ex ante distinction? If children with unfortunate lives think they just got unlucky and think their lives would have been positive in expectancy, they might not think that their parents did anything morally wrong. But they might feel differently if the parents knew their children would have a very serious genetic medical condition.
(But this is wild speculation, I have not checked for any empirical data on this.)
Maybe this is just an ex post vs. ex ante distinction? If children with unfortunate lives think they just got unlucky and think their lives would have been positive in expectancy, they might not think that their parents did anything morally wrong. But they might feel differently if the parents knew their children would have a very serious genetic medical condition.
(But this is wild speculation, I have not checked for any empirical data on this.)