You all argument from consumer point of view about disc size.
Of course, you have a right to do so, since you\'re the consumer....
but, more importantly ; it\'s about game developer ease of developing and peace of mind when it comes to coding for compression/non compression and format crackability. No format is totally safe from cracks in reality, but for developers it\'s crucial that general consumer mass and investors have enough confidence in either format.
Padding a BluRay full makes cracking a bit more difficult and no developer-publisher is eager to unneccesarily spend more production costs by going multi disc instead of single disc.