That would certainly be unfair and illegal but not what I was talking about, I think I made that quite clear.
It doesn't really matter if every woman at work contributes as well as the men, that's not where the motherhood gap comes from.
It comes from women taking more time off, or sometimes very large breaks, or stopping work altogether. Some of this is the decisions they make abbout how to raise their kids, or it's practical. In other cases it's health related.
For example: I have four children. That's four years of maternity leave. Plus, being in the military, there were certain jobs and courses I was unable to take while pregnant, so say three more years of time.
hat's four years other people who didn't get pregnant their courses for promotion, and having more time to pick up jobs that were advantageous. It only has to be a percentage of women who do this, and it will affect the statistics for women overall.
To put it another way: You can't look at the statistics for outcomes, and assume that if they are disparate for two groups, it's because of bias and discrimination. It could be for totally differernt reasons.