Even if the technique were perfect, there are unintended consequences to letting people pick things. You can think of the one child policy as a precursor exper

Even if the technique were perfect, there are unintended consequences to letting people pick things. You can think of the one child policy as a precursor experiment to letting people select genetic attributes (gender in that case). People selected the trait that they thought was “better” (male). The unintended consequence wasn’t that it turned out men are not good, but that too many men instead of woman was bad for the population in general.