You provide absolutely no evidence for your assertion that women, and others, are discouraged from STEM areas of study.

Students are encouraged when they display aptitude. These subjects are not like social studies where you can just try hard – they are difficult and only a fraction of the population has the capability.

Your top 20 woman, benefiting from affirmative action policies, and associated relaxation of standards, would be lucky to match the bottom 20 of the 40 men for whom no such advantage was provided.

I guess that since metrics now show better female academic performance, secondary and post-secondary, culminating with higher university graduation rates, your search for victimhood becomes ever more granular. 

Now, after considering your post again, I wonder whether you are having fun with somewhat camouflaged sarcasm. If so, you got me.