The whole argument crumbles right here. If a man wants to be a Free Software programmer, he does not need the kind of help a woman needs (for instance, to understand brogrammer culture and to know what to do about it; to communicate effectively with a male majority in mailing lists and other electronic forums; to steer from social pressures that would make them go away from exact sciences).
So, when you do a program like that, you are not doing so at the expense of men; the field will be as full of us as it always has been. But if you prevent a program like that to happen, you will do so at the expense of women; the result is that the field will have the same amount of men, but less women. Got it?