There's one thing you're missing here, and that is as women make up a larger percentage of an occupations' workforce, the wages start to go down with it, which is what happened or is happening with e.g. doctors and teachers.
Artificial protection and gatekeeping by ordinance are there to protect those who got there first. Then we can blame others: women or immigrants etc, for wage depression. Unions do this less but still favor those who organized first.
If capital gets to hire for less, say that. Maybe the opportunity was an increase in certain pop segments, but they dont make wages go down. The people who pay wages do.