You're clearly entirely unaware of the context of any of the diversity conversations that have gone on in tech in the last 5-10 yrs, including those internally and externally at Google. You're correct that expecting employer demographics to immediately exactly reflect US population demographics is stupid. You're wildly incorrect that it's uncommon.
As just one example of the top of my head, Google released their diversity a couple of years ago and coverage was almost universally: "Google has a serious diversity problem", "Google needs to do a lot better".
The actual gender numbers? Non technical employees were split down the middle and technical employees almost exactly reflected percent of CS degrees by gender.
Something isn't a straw man if it's an argument that's constantly made and carries a lot of influence.