No space is being taken away. A new space is being created. This space is to give a voice to a population who reports, as a group, being silenced and undermined in other spaces by the dominant group.
This allows voices to be heard that weren't heard before. That's inclusion. Having those voices stay silent is exclusion.
But what we don't always realize is that the internet isn't terribly inclusive in the first place. There's a prevailing atmosphere in well-populated tech spaces - Reddit, HN - that tends to shut down women's voices, especially if they're talking about an experience that men on the internet can't relate to.
I'm all for this project, hope it works out.