What happens if both work during regular office hours (as in my marriage)?
If you have very young kids, it's impossible to have a distraction free work environment at home unless you find someone to take care of the kids and enforce the no distractions rule.
People often assume, somewhat unfairly, that this person should be the mother. But what if mommy also has a professional career and ambitions?
During the pandemic, people who found working from home enjoyable tend to
a- not have very young children of an age they need constant watching or get bored if left to play alone, or
b- someone in the couple is a stay at home parent (usually the mother) who watches the children.