If you cook, you cook for a purpose, you don’t throw food away just because you’ve cooked for the sake of cooking, you eat it, or serve it to someone else to eat. In the end it’s a chore fulfilled still.

There’s overlap, but not necessarily. If I’m cooking for fun, I’ll cook things that are tasty and that I (or whoever I’m cooking for) would enjoy eating. I won’t be paying attention to the nutritional content of the food. But if I’m cooking for sustenance, then nutritional value comes first before enjoyment of the process or the food. Sometimes, you have to do both for one meal.