Actually it's not a myth. Look up bureau of labor statistics. Women clearly make less than men. I feel something must be done to resolve compensation when controlling for skills, experience, etc, gender alone shouldn't result in lower pay.
In fact, the reverse is true for younger women. Younger women make more money than younger men: https://www.theguardian.com/money/2015/aug/29/women-in-20s-e...
edit: The updated link you provided tells average "weekly earning", not an hourly wage rate.
Incorrect. Many salary jobs pay for over-time (and again, men are more likely to work over-time, on average).
https://freakonomics.com/podcast/the-true-story-of-the-gende...
https://www.aeaweb.org/articles?id=10.1257/aer.p20161124
There have been a bunch of studies of this, and the conclusions are pretty consistent: women aren't paid less for doing equal work, they're paid less because they end up doing less or lower-paid work once they have children, because they do a disproportionate share of the childcare.
This should still be fixed, but it means the fix is mostly about what happens at home, not what happens at work, which is much more difficult.