Think back to your school days and the best teacher you ever had. The one who seemed to know everything about his or her subject and had something all the other teachers lacked: the ability to boil down the complex ideas of the discipline so that you really “got it.”
Other teachers may have had a great depth of knowledge, or fancier credentials, but they couldn’t turn on the lightbulb over your head. Instead of making something complex seem simple, they did the opposite.
Those career tracks tend to narrow your perspective and influence the decisions and trade-offs you make every day. What’s best or most exciting for your department is not necessarily best for the company as a whole.
Then he has to figure out what prices to charge and be nimble enough to adjust them as needed during the day. He doesn’t want to carry the fruit (the inventory) home with him. If it begins to decay, it will be of less value tomorrow. Another reason he doesn’t want anything left over is that he needs the cash.