In terms of gameplay mechanics, old school zoom aiming achieves the same thing as ADS. Is getting to press your nose against virtual firearms really that important in a game about shooting werevolves and vampires?
I blame this on the proliferation of Call of Duty over traditional scifi and fantasy shooter franchises. You can fucking ADS on an assault rifle in Halo now 
Using my mouse and keyboard as I walk sideways across the balcony, I hold control key to mantle over the ledge before firing my weapon at the other players, a cool drink in arm's reach, the temperature a steady 72°F and comfortable humidity. The smell of a dinner preparing in my nostrils.
"This is about accuracy in gaming, something I take very seriously as a weapons expert," I state plainly.
"Who are you talking to?" my older sister asks, looking through the doorway. Her brow is furrowed.
"His name is ViperKing33 and he's basically a real commando in real life. He is an expert marksman and builds his own weapons."
ViperKing33 later asks if I've seen my sister's boobs before going offline to help his dad with the trash.