It also is a pretty common assumption, with some merit.
But here is the problem. It assumes that ones political views are almost 100% genetic, and we need to limit the reproduction of people with the “wrong” views.
Freakonomics made the same argument. The whole of the Dem party platform is based on it.
Except people can and do change. My wife’s family were hard core Democrats (all Catholics in her area had to be). She has never voted for the Dems.
It's Darwinian eugenics, it's been the hallmark of the left for over a century.
There is this utopian mindset that if certain elements of society are simply killed off, the world will be a wonderful place.
Sanger and a few others got the ball rolling with the idea that preventing the birth of these "undesirables" would do the trick and then Hitler came along and decided that it made just as much sense to kill the "undesirables" who had already been born.
It's a very slippery slope, but once society decides that things would be better if certain groups of people didn't exist, it always ends badly.