Fewer copies exist
You do get 12 boosters in a box which may seem less than the Draft and Set boosters, but you are expected to open higher value and exotic cards instead
Before we get into the identity crisis that Orzhov can sometimes face due to social contracts, largely I want to talk about another aspect that hampers Orzhov decks in practice: sequencing
The problem is that, in most decks, Harnessed Lightning kills four-toughness creatures at instant speed, and in black decks, Grasp of Darkness and even Fatal Push offer the same power, so it will take a pretty specific build (a deck that doesn't care about energy, doesn't want a Lightning Axe package, and isn't playing black) for a deck to really want Cut // Ribbons over the other available options
(If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.) Once a creature becomes monstrous, it can't become monstrous again
Whenever you Populate, you make a copy of an existing creature token