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 like iron sights but only because I like immersion. Lack of iron sights was something that constantly bugged me in Fallout 3 for example. Idk, the zoom feels more natural because it’s like your character’s fov narrowing due to concentration and it’s reflected by the act of looking down sights, rather than feeling like my character can just zoom in with their eyes if they try hard enough