Eugenics/Designer-babies... is the concept really that bad?

[FatAndFaithless]

Where on earth did you get the idea that health and economic prosperity correlates with having too many children?

People simply aren't capable of being responsible for their reproduction. I suppose you could program into them a decreased sex drive or amp up intelligence to the point where they'd be too far above that to be careless about birth control but one would think a simpler means would be turning their fertility switches to 'off' for the majority of the time until they decide they want kids and could prove to the current scientific experts that they're qualified. No 'accidents', relatively few unwanted children or orphans, much greater opportunity for successful adoptions, I mean, I really can't see a negative here. What's so bad about regulating population growth in a way that's already being used to enhance the species' genetics in the first place, if it makes people's choices about it (not needing protection or worrying about getting knocked up or spreading STDs) a non-issue?

Bolded mine.  But..they are.  As quality of life increases, life expectancy increases, sexual education improves, and access to family planning services increases, we've seen a decline in the number of kids Americans have over the last 60+ years.