It is possible you see better representation of both genders in a society where people choose their career based on potential ROI. Fewer societies allow its people to truly choose their career based on interest or passion alone, which might be where you see larger differences in gender representation.
However, that brings up the politically incorrect argument that men are more interested in Tech than women, which seems hard to justify as well.
While individual people need not be rational, a better theory is that society as a whole is largely rational when taking into account disruptions due to causal factors (people, groups, situations). These causal factors need not be rational, and the extent to which society allows these causal factors to influence it determines how far it deviates from rational behaviour.
However, that brings up the politically incorrect argument that men are more interested in Tech than women, which seems hard to justify as well.