At the risk of sneering at science for it's own sake: why is that the most important question? What extent is programming an innate skill doesn't seem to have many obvious utilities, but finding effective methods to address gender disparities in STEM fields does. Not to mention that these studies also indicate that a belief in effort rather than innate skill improves performance for both genders.
Why would you want equal representation in the field if the unequal representation were due to genetic differences producing different abilities or inclinations?
I don't think most of the current inequality in representation is due to those reasons, but certainly understanding the extent to which those may exist and play a part in determining outcomes has something to say about the results that should be hoped for.
