OK - in fairness I just got off the phone with a mouth breather....it was a hot take, and very shortly thereafter I reminded myself that I am not Bill Gates.
Nature has a way of regulating this phenom - where one individual is 2 or 3 deviations outside of the group - they died. Society has provided cradle to grave assistance. Particularly as it relates to immigration.........Consider the ideals of society and the social contract all pivot off of the intellectually capabilities of the citizen body. Yes, there should be a test and a standard.
I will also say that euguenics gets a lot of press as a negative thing. People really ought to understand while eugenics is a concept that has been black brushed by association with the Nazi party, or M Sanger; historically many groups have used that concept both internally and externally, as well as the concept of diaspora to their advantage. It is the concept in play with open borders.