Somewhere between the console, two controllers, a headset, and a handful of cables, something always goes missing. A cable gets left behind at a friend's house. A controller ends up under the couch. And the one time you actually need to move the whole setup — a dorm move, a trip home, a LAN night — you're carrying it all loose in your arms, hoping nothing gets dropped or scratched along the way.
The alternatives don't really solve it either. The original retail box is bulky, offers no padding for anything but the console itself, and most people throw it out within the first month anyway. A random duffel bag protects nothing — your console just knocks against whatever else is in there. And "I'll just be careful" works right up until the one time you're not.