While getting more women interested in natural science and tech is an important issue, the current approach in the States isn't working, and one of the major point in you-know-what is that despite the aggressive, well-intentioned push of female representation in traditional male dominated industries in fictional media(it does go too far sometimes), it does not seem to translate into the real world, ans enforcing a female only job fair also seems also well intentioned but unhelpful, because ultimately, you can't force people to like something.
It's troubling, but there doesn't seem to be an easy solution to this.