Flipping A Coin To Choose Your Kid

Julian Savulescu does a great interview with Dilemata:

I think this is just a basic principle of rational choice applied to reproduction. What surprises me is how much resistance there is, that people really think you should toss a coin when you have information about which embryo is better. Embryologists of course do this when they look at embryos and try to pick the one which looks best. But why do we resist it? There are of course many reasons, but I have argued they are bad reasons.

It is normal that parents look for the best schools, training activities and diets to make their children better people and increase their opportunities in life. However, why do you think that people do not accept so easily the improvement of our children through biological interventions?