What are the implications of this article?

There was a man who had just opened a drug store. One day, he was out and asked his son to take care of the drug store. A medicine buyer came to buy achyranthes, chicken feet, and yellow lotus. His son didn’t know the medicine and searched for it in the medicine box for a long time. He didn’t find any, so he cut off a leg of his family’s cattle and beheaded a chicken. His two feet were sold to a medicine buyer. When his father came back, he asked his son what medicine he had sold. After learning what had happened, he laughed and sighed: "If the customer wants to buy Anemarrhena and Fritillaria, why don't you also sell the mother?