What "understanding"? This paper provides no evidence whatsoever that sex-biased gene expression is due to nature rather than nurture. They collected data from adults only (well, 2 people were under 20 out of 137 subjects).
You aren't sporting much evidence to justify a righteous rant against your "angry emotional mob mentality."
While you are correct that this particular study offers no real evidence in the nature/nurture debate, my understanding of neuroscience is that the existence of early differences in gender-based behavior are so well established in the discipline that to publish on that result is no longer interesting to neuroscientists. What remains at this point is to figure out a mechanism behind that result. So the line of inquiry behind this paper is not so much "whither behavioral differences?" but rather "Given this large body of research over the past 10 years that demonstrates behavioral differences, what can we see in the brain that might be a mechanism for this result?"
If you are not familiar with that earlier body of research establishing behavioral differences, these studies might be a place to start, and then of course you can walk the bibliographies to find more.
Published just a few years ago, it criticizes much of the research on sex differences, and from the reviews it makes a very exhaustive and compelling case. I'm curious if these are some of the studies it criticizes.
(I don't have an opinion on this either way as I have not been able to examine the evidence. But I'm very interested to see that there is so much controversy, even among scientists, on this issue).
You aren't sporting much evidence to justify a righteous rant against your "angry emotional mob mentality."