@MrsTerryPratchett
Yes Sweden forces people to put their children in nurseries at one. Also, Holland makes people eat waffles and the Italians have opera as an A level.
Societal norms aren't 'forcing'.
Apart from anything we should be copying them because they're delightful people.
This is because it's impossible to live on one income in Sweden, both parents need to work for financial reasons. Worlds highest taxes and so on. My friends who live there all work between 75-100% jobs, and still handle most of the family admin. It is exhausting. Few have any help, such as a cleaner or nanny, that's definitely a societal norm. You don't outsource these things as there is a stigma attached to it, although it looks like the younger generations are less adverse to this than the older ones. It is just very expensive, and most people won't be able to afford this. I have friends where both parents are lawyers and they still don't have a cleaner as they feel it would be frowned upon.
With no nannies, it's very long days at school for the children (they can often stay after school in a kind of 'club', until around 6pm) and stressful for the parents who feel rushed having to pick them up on time.
As a woman, you obviously keep your career going even if you have children, mostly out of necessity, but also because you would be quite lonely as a stay at home-parent beyond the first year or so (unless you have several children pretty close together). There are clear benefits to this but I will say that in that system, it's going to be more challenging to advance your career as a mother vs a father: just one small example, who stays at home when the children are unwell and off school or nursery? 90/100 it's the woman, as she often has the lower income in the family. So it makes more sense to have the higher earner be the one who goes to work in these situations. My Swedish female friends take most of the burden in these cases, for that exact reason. If you are constantly off work in the winter months to look after your kids, you won't be doing your career any favours.
And add to this that typically, women tend to shoulder the overall burden of keeping family life going: buying birthday presents, booking dentist appointments, buying those shoes the children grew out of, writing the Christmas cards, the list goes on. I am of course generalising but I am basing this on conversations who my friends both male and female who live in Sweden and also Denmark, which is similar