>>714664145 (OP)120 on 16:9 goldsrc games
Low fov is only necessary to make out details when enemies are hidden faraway in cover with no silleuette and movement, which is resolved by guns with ads / scope or a little fov toggle button or just move faster to get close.
The center compaction and side stretching are good features to fit the retinal which has a narrow center cone of high density and wide range of low density in receptors. Given just enough pixels for silleuette for locking and much wider cone of tunnel vision, it's impossible to try to stop and take in extra details in a shootout while letting the target out of lock of a widened cone.
With widening the view also provides a greater range where eye movement and snap locking can occur.
Slight elevation like jumping on boxes while looking down a little gives so much info on space.
It only stops working when you can't make out the silleuette at the center even when focused.