I'll give some credit if English isn't the first language of the poster, but this sounds EXTREMELY condescending to me. Yeah, I do like technical stuff and I know women are not usually encouraged to do so and to enjoy science, but it has much more of a cultural basis than anything related to true intelligence or the ability to do any of these things.
But in all seriousness, I think the reason why there are generally fewer women doing photography on a "hard core" basis, is that; While it is a typically creative and artistic profession, you need to master a certain amount of logic and technique.
Photography can be very technical, especially when you get past the "pretty flowers and dogs" stage, when you start mixing in ligh theory, chemical theory, zone system and (dare I say) technical gadgets, women are put off.
It's not that they are less intelligent, it's just that IMO, they want to focus on the art aspect, that may also be why pottery, painting and drawing, and sculpturing, is more popular as art directions.