I bet Elon Musk has a number of advantages, such as: not doing laundry, not preparing meals, not washing the dishes, not going to the grocery store, avoid driving to work (either have a chauffeur or a very short commute)… Basically, not doing any work but "work".

He's rich enough that he can pay somebody else to do everything he can't be bothered with. That frees him to take care of his companies and have other creative ideas.

On the other hand, think of the work of the average housewife. She would do most of the house chores and taking care of the children, and would plan all of it. All that on top of a 40 hour work week, plus commute. Let's see: 8 hours at work times 5 days, 2 hours of house work per work day, then 8 more during the week-end. Add, say, 30 minutes of driving to work (and 30 minutes back), and we get 63 hours of work per week. And that's a conservative estimate.

Just try asking her to do personal projects on top of that.