This is not how companies operate, for the most part. If a company wants to hire 1,000 people and 10,000 applicants are in the top 1%, they will move the bar up to hire the top 0.1% instead.
Given a normal distirbution of applicants, there is a huge difference in talent (10x?) between top 1% and top 0.1%. The bar always automatically adjusts higher; otherwise, a competitor will hire the fraction of the 0.1% that you've passed over. Now the competitor has a 1,000 workers, and you have 1,000 workers, but the competitors are 10x more talented for the same pay (most of the 0.1% didn't get an offer from you, so there's no bidding war for their talents).
Actually, if a company spends more money recruiting each equivalent female employee than male employee, they do effectively drop their total hiring bar if spending more money lets the company climb the bell curve, because it's effectively a reduction in spending efficency, but that effect is small, and skill parity is still achieved.
