i have fired a number of guns, when you are familiar with a gun and the way it shoots firing from the "hip" does not make it any less accurate. if your pointing at a target and fire at it the bullet will hit it simple as that
Firing any carbine, sub-machine gun, shotgun, rifle, long-rifle... let's just say any weapon larger than your forearm from the hip on anything but single shot? Good luck controlling the recoil and hitting anything smaller than the broadside of a barn. The first shot will probably be fairly accurate, yeah, but not the second. Police and military forces train policeman/soldiers to hold their guns in a certain way for a reason.
And I believe ADS will reduce the muzzle-flash you are exposed to and allow for a more consistent control on recoil? Not sure, waiting to play it xD