I'm not really sure I see the point. A relatively small company might have a skewed gender ratio just as a result of random variation. The issue is when a large company like Google, or the industry as a whole, has a skewed gender ratio.

> it makes me wonder if people expect that firm to have fired some of the women just to make room for men. I definitely would not want that.

No-one ever suggests doing that, so why are you bringing it up? It seems an entirely artificial concern.