In other words, you're agreeing with me - since mothers had to both work AND do everything at home, they too were living in a culture that was designed to have someone out in the world of work and someone at home taking care of everything but since that wasn't the actual reality of things, it left women doing it all (because as you noted, men weren't doing their share). It's not a system designed for co-parenting, co-sharing household chores, etc. Just look at your grandmother's and great-grandmother's generation. They were expected to do all the "support work."

This is the same problem we face in the US today. 79% of mothers work, as do nearly all women, and yet the system is not set up to support that. It's set up as though everyone has a "wife" at home to take care of the non-work parts of life. But since that isn't the case, men who want to share responsibilities suffer, as do women who want to have careers and have families.