If someone's children will likely have a lower than this minimum intelligence, which you can infer from parent's IQ and other measures, will you encourage or prohibit them to use either embryo selection or genetic engineering? What are the impact on the child's life for each option? Is the 'distaste' more important than giving a better opportunity for the newborns?
Also, what can you do? You cannot put regulations on China or other countries. On this issue, they will not agree on international agreement either. And there will be rich people who fly to other countries to have the procedures done. This will cause even more inequality than allowing it domestically.
Jordan Peterson IQ and Job Market https://www.youtube.com/watch?v=fjs2gPa5sD0
Can it really be inferred? Not including conditions or syndromes of course. The parents' environment may have affected their intelligence and the child may turn out entirely different.
Getting parent's DNAs sequenced might be needed but it's affordable now. See gwern's answers and link for more info.
"This child is still you, just the best of you."
I don't know if the "economic competitiveness" part will be a comforting argument if this ever comes to pass. What I mean is, it won't been seen as "look at how our economy could grow if we do this." That economy would just be viewed as the new standard. This technology will be seen as "do this or you will be left behind." I fear it will be coercive and alienating.