I'm a man and I am ignorant of this alleged man-only social network that supposedly helps me get notice of job openings. Doesn't that suggest that it doesn't exist? If it does exist yet I'm ignorant of it, doesn't that suggest that the same might exist for women? I propose that there is a woman-only social network that is helping you to get notice of job openings, and you are exactly as ignorant of it as I am ignorant of the one helping me.
The women-only network is tiny. It's true, we rally together and encourage more women to work with us, for fear that the field of STEM will continue to be unbalanced. Where the continued creation of technology is primarily designed by and for the global minority (non-working class men), we lose out on innovation and this affects everyone.