That is a good basic question, Remius. But what if the answer is: It's not us?
Let me try and illustrate, and since we are in Canada, I'll use hockey - but also because I am heavily involved in my town with the hockey organization.
Women hockey is pretty well in the news all the time in the last say, 12-15 years. The National team is reported on, incensed in view of its performances, on TV for all major tournaments, the leaders extolled publicly, and employed after their career in sports reporting, etc.
There's a National team, a pro-league and women hockey at the university level and in the lower grades, in every town in Canada or just about.
Yet, every year, in our town, I get 10 boys registering to start to play hockey for every girl that does. Meanwhile, in absolute numbers, the figure skating club gets 8 girls registering to start figure skating for every girl I manage to attract to hockey.
Is it because I am doing something wrong, or is it because parents still have a girl/boy activities approach as to what their little girls should participate in? In other words is there still a societal values bias against girls in what is seen as "masculine" undertakings? And if so, is it possible that civil society as it exists right now is still the one that pushes male/female distinctions as regards what is "acceptable" for girls or not? I only suggest that you look at the family, at large, reaction when their girl suddenly tells them she wants to be a fireman, or an industrial welder ... or a soldier. Then come and tell me it is the military that is pushing them away by what we present as an image, and not still accepted society norms.
Shouldn't the government, if it claims to be feminist in the sense of equality of result type of feminism, be better to work on convincing parents to push girls, in their formative years, towards, STEM, physical work and trades and anything "male" like the military, police or firefighting?
Until you change the parents/society at large and what they teach girls to strive for, I surmise that there is no approach, feminist or not, that the CAF can adopt that will lead to more woman showing up at the recruiting centre.