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 
Gun owners and enthusiasts are extremely annoying. Every time a gun is shown, you get a bunch of annoying people virtue signaling about le trigger finger and le magazine NOT CLIP!!
And they’re not anal about the gameplay mechanics. They’re anal about the animation details which shows the character having a normie understanding of firearm technique.
Anyway, not even Tarkov is as realistic. I’d say ARMA, Project Reality, and Squad are because the player holds the gun right in front of them at a lowered position rather than to the side like most FPS games.
Taking away people's guns because you want to weaken the proletariat
Taking away people's guns because gun owners are also treat brained and annoying on the internet
That's basically where I'm at. Got some crazy stuff but I've never bemoaned realism in shooters, maybe with a rare exception for something billed for that like ARMA/Operation Flashpoint or Receiver where the whole point was that it's actual gunplay.
To be fair you'll find the same thing with HEMA people hyperfocusing on sword handling techniques and stuff too. Every game that doesnt have you holding the sword by the blade and using the thing like an axe is a failure. Unfortunately they also tend to get racist and sexist a lot quicker.
Okay but consider; actual longsword is fast, elegant, and looks awesome, and games would be much cooler if they actually incorporated elements of that in to stylized game combat.
Plus it's called "murder-bash" and it looks totally awesome so why not put it in the game?
Arma (and helldivers 2) is fun because the bullets come from the barrel of your weapon instead of the center of the camera. Doesn't matter where the weapon is pointed, so bullets can do zany things if you fire while running, or are firing when you get shot or stunned.
I'd say Call of Duty is quite realistic having people in the US military with their guns constantly right in front of them
I haven't checked on it in some years but Ground Branch offers different stances like ready and low ready for the gun while moving which looks very realistic.
Arma allows you to do that, too. And some mods add a safety!
There's a vr game called Breachers where your movement speed is partially decided by how you hold a gun. Holstered is fastest, then low ready, then high ready, then shouldered and aiming. The game does it dymanically based on how your vr hands hold your vr weapon.