Science or theory?

From Oz Conservative:

Professor Kenny suggested that the spatial ability of men often made them better at tasks such as putting together module furniture or setting up VCRs and also made men more suited to certain careers such as cartography, engineering, surveying and IT.

Why is all this so politically significant? On the one hand, liberals will dislike the scientific findings. Liberals want us to be autonomous, self-defining individuals. Therefore, they want to believe that our sex, the fact of being born a man or a woman, can be made not to matter. For this reason, they usually prefer to explain sex distinctions between men and women as being artificial social constructs, set up for purposes of domination and oppression.

On the other hand, liberals like to think of themselves as being scientific types. They generally look down on those who don't accept a scientific world view.