your argument begs the question of whether or not we can successfully test for this trait to begin with.

i don't think we can. the outsized productivity impact a good person can have far outweighs the statistical probability of getting one if you simply accept all competent interviewers, i.e. the expected value is so high that you can blindly hire until you find one, given sufficient financial resources. without the financial resources, you only hire people you already know are good, which is the general pattern i've seen over 20 years working in this industry.