Honestly, dude? None of these figures are relative to the portion of a given minority that PURSUES filmmaking. Yes, half the people on the planet are female, but are you really telling me half the directors on the planet are?
I have some friends who work in TV as showrunners and writers. They say it is approximately 1000 times harder to get hired on their staff as a straight, white male than any other demographic due to silly stipulations like these – even if you're the better writer.
This isn't something that needs external mediation. There's opportunity out there for whoever's hungry enough to get it. People need to just focus on doing good work – the landscape is already barren enough without stifling people's creative freedom to fit some quota.