The catch-22 is that Apple shoehorned substantial complexity into the charger, to make it and associated cables/connectors very lightweight, while still supporting batteries with very high power density. Compare the article's photos of the PCB, etc, of the Apple product and the cheap knock-off, both of which have to squeeze into the same plastic housing. That complexity costs money. Trimming out complexity generally means trimming out safety features (which already are possibly insufficient, considering some of the other responses on this thread).