Problem?

Why is it a problem? In most societies nowadays, both men and women are free to pursue the career path of their choice, as well as their hobbies. If there are simply fewer women than men who are interested in FOSS development, or programming in general, so be it. Who cares?

The only potential problem would be if some projects were to discriminate against women and discourage their participation. If this were to happen, the freedom of FOSS makes it easy to fork projects to new leadership which doesn't care about the sex of contributors, leaving the previous leadership in the dust.

I'm not sure of their goal here, but if it is a 50/50 balance, or one approximately so, IMHO that's unrealistic and wasteful.

Let's pursue freedom. Let people do what they want. If that results in a certain male/female ratio among certain projects, who cares? Saying that more women need to be involved is, in principle, almost as bad as saying that fewer women need to be involved. Let people choose for themselves.