It happens without being measured. It just is. Of course we know that is not true ultimately, but for many people it is true on a daily basis. Children just eat. Husbands often just eat.
Guests just eat.
The cook gets no recognition except for a special occasion. The daily breakfast gets nothing. I think perhaps there is something in requiring cooking that continues this pattern. Other forms of work are seen as having both use and exchange value. Everyone enjoys the garden and gardeners are praised for gardening.