Same reason everything else that is imported is imported - comparative advantage. Take the logic of "grow all your food at home" too seriously and you end up l

Same reason everything else that is imported is imported - comparative advantage. Take the logic of "grow all your food at home" too seriously and you end up like this guy: https://www.smithsonianmag.com/smart-news/making-sandwich-scratch-took-man-six-months-180956674/ https://www.smithsonianmag.com/smart-news/making-sandwich-sc...