Re: is it my fault?
"Men and women are different mostly due to acculturation rather than biology (excepting the obvious physical differences). There are no 'men's brains / women's brains' type of differences. Put a number of brains under the microscope and you couldn't tell which ones came from men and which ones from women."
Well, first men's brains are on average slightly larger than women's, so there are men's brains/women's brains differences. Second here is a link (National Institute for Health) to a scientific paper proving you wrong. In it, it is noted that Down syndrome is more likely to affect males than females.
So, now that your sweeping general statement has been debunked, we now should ask whether there are any genetic conditions (hello, autism spectrum) that are not balanced between the sexes and that increase/decrease ability in some jobs.
For example, if there were a genetic mutation affecting one in 100000 men and one in 200000 women, that massively improved distance judging and hand-eye coordination, then almost every top archer and snooker player in the world would be male. On the other hand, the average man and average woman would be almost exactly the same at archery, and so you'd see news reports asking where all the top female archers were, and what is holding them back (and 99.999% of all men as well, but, and here's the important bit, we are comparing two different populations).
You of course don't see news reports asking why top female basketball players can't mix it up with the men because we all know that men are taller than women, but the tallest men are massively taller than the tallest women. (Tallest living man, 251cm, tallest living women, 221cm. But the average height difference is about 10-15cm.)
I'm not saying that sexism doesn't exist (although it depresses me that every time someone states actual, reliable facts, certain people have to shout 'sexist'), but there are alternative explanations for the distribution in certain niche professions than sexism.