The cause and effect is hard to tell, but this is exactly why large corporations should try to be diverse. How do you get from 8:2 to 7:3 in 5 or 10 years?

Little girls don't want to be programmers or scientists - why is that?

My gut feeling is that it's ti very a small part biological and to a large extent just momentum. With more female role models (moms not least!) in tech, things will change. Thats why I think it's very reasonable to hire for diversity (that is - hire someone on the basis of being a woman)