Look at the chart. "Computer and mathematical occupations" is male majority, but not male-dominated like say train drivers or mechanical engineers. Some subfields (web and interface designers, notably) are pretty balanced.

We study diseases by (first) looking at people who have severe forms. Ie it would be tough to come up with an understanding of autism just by studying the brains of people who are "a little aspy". If you can figure out what causes the gender segregation of train drivers / pediatricians, maybe you can apply that knowledge to relatively-mildly-imbalanced tech fields.