hopefulhalf that scenario is great but too many women don't have it. When I asked about expressing milk at work I was told "schools are different, you can't expect that, it isn't workable". I was told the same about my request to do 3 days per week - we had a two week timetable, it wasn't fair on the children to split classes, full time was preferable but they'd make an exceptional arrangement for me to teach a 60% timetable but all the lessons for my classes - so I worked every day but for a 60% wage, and theoretically did my marking, preparation and admin in my unpaid 40% at school. I kept being asked to cover or come into meetings though, and saying no created bad feeling because the children (not mine, the school children) should be my priority, the staff had to pull together and we all knew things were tight etc.
I worked in a large secondary school and only late in my pregnancy did I twig that of the 80 staff members there was not one woman with a child under 5. Plenty of men with babies and sah or part-time wives though. My department head admitted to staying late to mark at school to avoid his children's witching hour of tea and bathtime, before I announced my pregnancy.
When I was pregnant and had morning sickness he reprimanded me for leaving a well behaved top set year 11 unattended while I ran to the bathroom to vomit - he actually said I should have arranged cover or used the classroom bin!
When I returned to work and my 5 month old breastfed baby wasn't taking a bottle at nursery I was taken aside and asked not to leave at 3:30pm to pick her up and breastfed her, because teachers leaving at 3:30 created the wrong impression for parents.
Returning to work after 6 months, or even if you live in a country with dreadful maternity provision 6 weeks, leave probably isn't going to kill anyone, we all survived - it can be really shitty though, who wants to just survive, given any element of choice?