Firstly, that most computer games are written specifically for males and, secondly, that there ARE many female game players and there ARE games that are eminently suitable for females even though they might not escape the tyranny of blatant sexism. Let's face it, as computer game players, we all know that males aren't the only ones who enjoy this hobby. Despite the fact that they are not really invited to join in the fun, it's a myth that females don't play and have no interest in computer games. Conversely, it's a myth that only males play computer games and it is important to acknowledge this side of the equation because it is essentially this 'truth' that drives the industry. Fewer females play because there are fewer games that might interest them.
Hormones have nothing to do with it.
This, of course, assumes that females are less likely to be tempted by the plethora of war or sports games etc. which largely involve combat or domination scenarios. Some females do play and enjoy these games, just as many males enjoy story based games with no combat. But the bottom line is that most games are developed by males for males and are overwhelmingly reviewed and marketed by and for males. For females this exclusion has serious consequences and it may even have serious consequences for the games industry itself. They are all clearly toys for the boys.