To use a oversimplified model, assume everyone can be perfectly linearly ranked.
The gender ratio is skewed towards men at the top purely due to pipeline reasons (because college grads are nowhere close to 50/50).
Set a threshold to call your "standards" (say top 10 if you have budget for hiring 10 people).
If the top 10 are 7 men and 3 women, then you must give up on 2 of the men to fill it with 2 women from below the top 10.
Do you call this "not lowering standards"?
(I have no problem with lowering the bar to achieve better gender ratios because of long term social/game theoretical reasons. I just pedantically don't like lying to ourselves about not lowering the bar)