I don't know where you get your 50/50 stats from. There once was a time when there were no women at all in Science and Engineering. And women were expected to become nurses, not doctors.

That trend reversed when women were expected to enter university due to the new economy. And women did better than men because it turns out men are lazy, don't study, and don't read the assignments. When men do get into university, too many party and fail to keep up.

And what does that have to do with women in television? Nothing. Since TV doesn't reflect university but society at large. As critiqued in Dear White People, the problem with mainstream TV is it often is propaganda for corporations with white males aged 18 to 54 being more important to company bottom lines than women, POC, or the elderly.