There have been studies done (but not at extreme levels). They are with identical twins separated at birth and also with comparisons between adopted vs genetic children.

They definitely show a large nature component in that the identical twins tend to do more similarly. Nature seems to be a good deal greater than 50%.

However, as a society, we need to stop assigning the value to a person to their ability whether natural or developed. We also need to ok that there are some people that are better than others at certain things whether natural or developed.