Excellent points.
Another point I haven't seen address here is this:
What exactly IS a "superior" human being? One with good looks? One without genetic diseases? Well, suppose one is free from inherited diseases, but still contracts a fatal or chronic communicable disease? Is a genius "better" than a person of average or inferior intellect?
Or is a superior human being one who loves others? One who tries to do good to others? One who embodies the virtues of kindness, honesty, responsibility, self control, courage? Can those and other personal virtues be detected by scientific analysis? Can such personal virtues be developed by good breeding?
I think the answers are self-evident.
Of course, they are. Just listen to the eulogy at any funeral.
> What exactly IS a "superior" human being?
A human that is capable of, and successful at, reproducing the greatest number of equally reproduction-successful offspring.
This means that the CHinese will probably be seen as the most successful type of human. They breed rapidly *and* are not afraid of removing genetic diseases from their gene code.
Like it or not, a refusal to consider medical advances that strengthen your offsprings genetic code will lead to your offspring being weaker and fewer in number. Breeding a race of slaves, in effect.