[queequeger]

I don't think screening prenatally for disease (or curing it, removing it) could be looked at as a bad thing under any context (except maybe religious). I don't see it any different from a more traditional immunization. I think the reason this fellow thought it's not something he wanted to get rid of, is that this is what he's used to. Making his son healthy would mean making him a different person, and he obviously loves the person his son is.