The whole system is systematically sexist.
I didn't get one job at final interview where I was asked about plans to have DC - the other candidate was a man.
When I had DC1 I earned more than DH.
We then both asked to go p/t to allow us more time with baby - childcare costs were about equal to one of our wages; my employer agreed, his didn't - despite giving women at his company the right to go p/t. I'm not sure mine would have agreed either, had I been a man.
As a result he then became the higher earner, and has continued to enjoy better career progression being full time (plus I took another maternity leave and had to take the whole time off myself for other reasons). This means we've ended up prioritising his career - we can't afford not to.
We simply can't find the (affordable) childcare to allow me to pursue a full time, driven career as well. I had to quit one job as it was simply untenable working "normal" hours in the office. No family help. School wrap around care finishes at 5.45, and most holiday clubs seem to finish at 4.30?! The school is nowhere near the business centre of the city we live in, meaning I have to finish early to pick up, which in my profession is not really the done thing. Childminders doing school pick up don't seem to exist and it's hard to find a nanny who wants wrap around hours only, plus that would be very expensive.
One of us needed to compromise, and society is shaped for that one person to be the woman.