For the most part, women don't take up much space in the tech industry. Women look at the big names in tech, and they don't really see people who are "like me." This can be intimidating and disheartening. Creating more spaces for women to connect with other women, and share their experiences and encouragement is much needed. Of course, let's also not forget women of color and trans women, who obviously face additional challenges in finding people like themselves to look up to in tech. I hope that GitHub makes an effort to include a wide range of women with different backgrounds to include in this series.
Also, there's no reason why any women's group should have to admit men to appease the "I promise we're not sexist against men" line of reasoning. I probably shouldn't be surprised that some of the first comments on something oriented towards women is, "But...WHAT ABOUT MEN?!" Get over yourselves! Let this be a reminder that the world does not revolve around you and people like you.