1. Women aren't going to want to join a group where they're the minority 2. Given a brand new group with 0 members yet, it's still likely that women will avoid

1. Women aren't going to want to join a group where they're the minority 2. Given a brand new group with 0 members yet, it's still likely that women will avoid it, because of their past experiences with 1. putting them off joining groups in general 3. Women are less common than men in general in CS. Any group that accepts the average person will statistically end up with more men than women. The groups that "advertise" to women avoid these problems, which is why they tend to work. I agree that we shouldn't need specialized groups, but I haven't seen any other solution, at least in the immediate term. Likely society will improve simply due to the passing of time, and in 50 years from now and it won't be a problem anymore.