This entire series boils down to Destin finding this simple thing out again and again.
If you want to assemble a bunch of low value inputs into a finished product, America isn't manufacturing the low value inputs.
Basically every step along the way he has tried to make his business buying a bunch of American made low value inputs and then paying a room of college aged kids to assemble them into a high value product. And he keeps finding the same answer, you can buy your inputs from overseas or make them yourself.
