Reality is, this has been obvious for hundreds of years for anyone with two eyes to see.
Stupid people exist. Very stupid people exist. Intelligence has a genetic component.
We know that exist. Learning why they exist doesn't change this fact.
Our belief that humans should be treated with dignity and respect should not and is not contingent on our ignorance of the reason.
Knowing why Bob and his children are stupid should have no bearing on how Bob and his children should be treated.
Reality is, this has been obvious for hundreds of years for anyone with two eyes to see.
Stupid people exist. Very stupid people exist. Intelligence has a genetic component.