The logic doesn't follow entirely. Just because something's been there or done a certain way in the past doesn't make it necessary for the future. Clearly you don't want to be born with everything your parents have. That's why we put antibiotics in the eyes of every newborn in developed countries. The antibiotics prevent chlamydial/gonorrheal blindness
in newborns. That being said, it's something to think about and evaluate scientifically - so far it's very early to make any decisions about this stuff given the real lack of data.