> It's strange to see everyone hold up this movie as an argument against this sort of testing.

I read the movie as a criticism towards a society that grew accustomed to certainty, to a very narrow notion of physical perfection and the removal of all risk in favor of that. In that sense, the testing depicted in the movie induces society to an error, optimizing for a narrow set of traits, the expectation of fashionable accomplishments, where the explorers are not those who yearn to explore, but those whose genetic makeup makes them best suitable.