First, fundamentally, it is the principle that obedience to a corporation is superior to obedience to a man.

Second: Notice that median wages start to decline when women started to significantly enter the workforce. In late industrial capitalism, the Sociologist David Graeber (RIP) noticed that much of the expansion in employment was in things like marketing, PR, HR, secretarial staff, etc. which didn't increase output but just follow regulations, establish corporate culture or adjust consumption distribution between competitors in one market through emotional tactics. As a result of this expansion of the workforce without adding net output, total corporate output per worker declined,and so companies were able to increase the share in profits over labor over the last several decades. Despite gains in actual manufacturing productivity. Thus wages stagnated for many decades.

(Of course this is more an intellectual exercise than a particularly assertive assertion, and not all female employment yields no output. Ultimately everyone who is able and willing should be free to pursue productive work, but there is no need for government or institutions of cultural power to push, either by mandate or expensive incentives, any particular pattern of such choices)