When was the last time you baked your own loaf of bread? How about making your own clothes? Or growing your own food to sustain yourself, and your family?
We really would never think of doing any of above because it is not an efficient use of your time. It makes much more sense to buy the bread from the grocery, or buy the dress you love from the local boutique. Although, in effect we have outsourced those tasks, this has become the norm for us.