For some companies who believe an equal workplace should be 50% of each gender then you're right, but that doesn't make the system pointless. The idea of a "gender bias-free" hiring process isn't necessarily to make workplaces more equal or to promote diversity. The point is simply to remove a bias - to eliminate something that pushes you to hire someone who isn't the best candidate. Having a bias drives you to make an irrational decision. If a hiring manager has a strong bias in favour of believing "men are better coders" then you could miss out on some great hires. Removing that bias can only make your process better.