Yes, we all would wish our children to be intelligent, and healthy, and beautiful, and that is more likely to be the outcome if we marry people with those traits and whose families exhibit those traits.
I think it's also true that people who even a few generations ago would not have survived or been allowed to reproduce do so now, and that this might have deleterious consequences for society as a whole. (Of course, marrying one's offspring to diseased or otherwise genetically unattractive people has often been done when there was a financial or social benefit to it, and those marriages had consequences too. Close cousin intermarriage has also been practiced by certain groups in certain eras and we know the deleterious results of that. )
However, that's a far cry from letting
any entity. or any other person, for that matter, make that decision for other individuals. As Aberdeen stated, eugenics has almost always been manipulated to suit political agendasor nefarious ideologies of one sort or another. I don't trust any group to make those kinds of decisions. Perhaps we all need to read Brave New World again?
I even wonder about the long term effects of people choosing to alter the genetic make-up of their own offspring through new techniques. It sometimes seems to me that it's the very diversity of the human genome and the constant random permutations that has allowed for our survival. Who knows when a supposedly deleterious gene might come in handy? It's happened before. That's not to mention that, as someone else stated, it would become a very boring world. Moreover, would these things mean anything anymore? What would beauty become, for instance? What would it mean, if there was no ugliness?
Ed. Just another thought. Physical weakness is often the enemy of human progress. How many eminent scientists, or artists of one sort or another, were lost to us not only before they could reproduce and pass on their talents, but before they could put them to the use of all mankind? I have Keats on my mind lately, and he died at 26 of tuberculosis. Susceptibility to TB definitely was genetic...it wasn't just about exposure. Everyone would have been exposed. How many geniuses and their otherwise valuable genes did we lose?