What good is a back-up if it will never work? Say you "back-up" as the CD's are now, and then a month from now your CDD malfunctions and melts/scratches your BD disk 2, what now? The "back-up" wont work because it wont pass the protection, you're screwed and forced to either buy a new copy or resort to illegal means of by-passing the protection.

That's just one of millions of things that could happen to cause a CD to stop working.

Yay, everyone rejoice that we can "install" the game from a back-up, you can't play it, so why bother?