Yep, now keep going along that line of thought…
Why are there more men going into computer science? I'd argue it's because women are deterred from the field by a combination of society pressures.
How can you convince them otherwise? How about showing them from an early age that women can, in fact, achieve success in those fields. That'd be one way to help.
And how can you do that? Well, it's hard, but doing something like having more female speakers leading the biggest developer day of the biggest (and most publicised) tech company in the world…? Yeah, that'll definitely help.
So thanks Apple, nice start!
(And yeah, OF COURSE this works both ways. I for one would be delighted to see more men get past the idea that certain professions are "not manly". Hopefully, there are leading figures in the fashion worlds etc. that are as forward-thinking as Apple!)
You are partially right in that more women should be encouraged to go into computer science from a young age, but you're completely wrong on the causes: it's mainly women, especially through women medias, magazines, marketing and consumption who are self-sustaining their own superficial clichés, not men, not society.
Women ARE NOT deterred from the field of computer science, they are never interested in the first place, because most other women, whether in medias are outside, are not interested or talking about it.
Positive role models can help but won't change anything if the feminine culture at large remains the same.