> Some people had young children that didn't understand that "you can't bother mommy or daddy right now" and it was a constant fight.

When you're working from home, you yourself have to treat it as being "at work" just as much as you expect others to.

This means that if both parents are working from home, you still need someone else to look after your kids. Either out-of-home daycare (preferred) or an in-home babysitter.