You may "let it go," as you say. That's fine. However, why do you expect others to also let it go? The point of this post to me is that if we don't take action or responsibility, the daughters of today will grow to write these posts themselves someday. It won't change unless we are honest and we put forth the effort to understand the environment and circumstance that leads us to write these articles. And we have, what, one of these posts a month? Can we really ignore them... and keep ignoring them?
As a teacher, I admit that I don't share your ability to let others' circumstances not own any part of me. I do notice how these issues affect the women who chose to take my intro to programming course, or affect the lack, as it were. You just have to be active and look and ask for their experiences. When they come into office hours and ask questions they could have asked in class; I ask them why they didn't and more than one has answered "because I am shy."
Could they all be shy? That's certainly an explanation. I could look the other way from then on and comment how odd it is that women are so shy. Can I rely on this being a biological answer? Are women, as opposed to men, then just not interested in tech? Can I be satisfied? Maybe most are good stopping right there. But the anecdote alone fails to placate my understanding. And yet, if I look, I find evidence of something... more... problematic.
So, studies were done. Are women worse than men at math keeping them out of tech? http://www.sciencedaily.com/releases/2008/07/080724192258.ht... No. Are they less interested? Well, Sapna Cheryan's study of the stereotype threat in computer science is profound: http://www.youtube.com/watch?v=TYwI-qM20x4 So, their interest is very likely to be prejudiced. So, it seems the correlation is weak. Is there a systemic bias that goes against women? http://www.pnas.org/content/109/41/16474.abstract Apparently, yes. And I have a handful more that show this. Which is why I anonymize the homework I grade and why conference/journal review should be blind (http://blog.davewilkinsonii.com/posts/conference_diversity).
Attempting to explain the drop in participation of women since the 80s is very necessary. The fact that 13% of undergraduate CS degrees earned by women in 2010 (http://www.cra.org/resources/taulbee) is an increase is both terrible and a tad optimistic. Yet, before we get excited and say the problem is solved, here's the entire graph: http://www.aip.org/statistics/trends/reports/spring07a.pdf In 2011, 57% of the entire workforce are women, 25% of computing workforce are women, around 9% of programmers are women. (http://www.ncwit.org/sites/default/files/legacy/pdf/BytheNum..., http://archive.aneventapart.com/alasurvey2011/01.html) So, we should be paying more attention, there is something wrong, and writing like the original post is part of that discussion and valuable.
Also, please don't tell your kids that they should "ignore them and they will go away." That's not how you deal with bullies... that's how you become invisible.