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 
I used to know a guy who was IMFDBcore. Yes, these people will flip shit without iron sights in first person lol
Thank fuck they removed this in Infinite but also rip Halo