This is a good point. It's simple economics. If there is a sudden rise in worker supply, but not a corresponding increase in demand for those workers, wages must fall to accommodate the influx.
So the total labor required to live and work successfully in industrialized nations dropped but instead of that leading to more individual wealth it just meant that households now had allocated more of their labor to wage labor compared to before where half or more of the labor of a household was simply unacknowledged and unpaid.
And it should be noted that poor women had been working. For less compensation than men, while performing domestic labor. Middle class and upper class women getting jobs was another story.
Boo, hiss. Feminism. What an odious little comment thread.
Why? You're the one who injected the "Boo, hiss".