Great article. I've been researching the rise of what we could term ‘anti-essentialism’ in social sciences since around the 1920s (i.e. all differences are malleable social constructs). In the words of Carl Degler:

“The evidence shows that it was the ideological or philosophical belief that the world could be a freer or more just place that played a large part in the shift from biology to culture. Science played a role in the transformation, but a limited one.”

The primary cause of misleading claims about social science is this activist mindset.