You're completely missing one of the main points of the whole gender discrimination discourse: that there are strong social influences that prevent women from going to tech long before your 'before college', as well as during college and after college. There are many turning points at which girls are influenced the way that discourages them from tech instead of helping them to develop interest in it. So yes, discrimination is definitely the reason why women are underrepresented in tech, even if there would not be 50/50 women/men ratio without discrimination. You can claim discrimination if the environment subtly discourages you with constantly signalling that you shouldn't pursue a certain path. And yes, men who'd like to pursue 'non-male' careers also often choose not to because of the social pressure. And no, the diversity debate doesn't 'get too much attention'. It gets significantly less attention than it should, given the scale of this problem and devastating effects the lack of diversity has on societies, working environments, women, men, children - basically, any social group.