Housekeeping as a business is a dark mystery to her.
The mass of women in the United States probably hold, almost as an article of religion, the theory that woman's place is in the home.

But the woman who can organize and manage a home as her husband manages his business, systematically, profitably, professionally--well, how many such women do you know?
It would seem as if in the newer generations, the average housekeeper is not in the professional class at all.

Usually she lacks professional training.

If she was brought up in a well-to-do home where there were several servants, she knows literally nothing of cooking, or of any department of housekeeping.

Even when she has had some instruction in household tasks, she almost never connects cooking with chemistry, food with dietetics, cleanliness with sanitation, buying with bookkeeping.
She is an amateur.