What, yelibam said.
Plus, if it just auto-crafted lesser ingridients for you automatically then the game would be too easy. Setting up your lines and manufacturing these things yourself is what this game is all about. Why would anyone need to set up a factory if you could just go grab some oil, iron, coal, copper and caterium, click supercomputer and the game automatically crafted the lesser ingridients on-by-one then made the computer?