But this argument rests on the case that Bryana was solely chosen because she's a women, when in reality she was chosen because she had the qualifications (much like some of her other colleagues) and is
also a woman who had to overcome more challenges to make it to where she is now. That's a pretty interesting and under-represented vantage point to hear a speech from.
This all relates to the same debate about affirmative action that's been happening since the 60's.
http://www.thecrimson.com/article/1976/5/19/bernard-davis-an...
This guy (happens to be my grandfather) argued essentially the same point as you: that black students would be accepted to the medical school based on a lowered standard, and end up graduating as less qualified doctors as their white counterparts. This in turn would lead people to have a general mistrust of black doctors, because they would be seen as only being in their place through affirmative action, and not through merit. That is definitely a scenario to avoid, and also definitely one worth considering in debate.
However, this has proven not to be the case, and Harvard is still viewed as ranking among the greatest institutions in the world, even though they have been admitting minorities to their program since the 70's! In fact, here is a more recent Crimson article highlighting some points in defense of promoting people in minority groups: http://www.thecrimson.com/article/2012/11/7/affirmative-acti...
If we want to decrease the gender inequality in STEM, we need to take concrete action and promote the hard work of women and other underrepresented groups in order to slowly shift the male-dominated culture to one that's more diverse.