How important is FOV?

[Vampire]

Some games have a distortion at the edge of the screen. Some games have a slightly more cylinder like of appearance as it's commonly seen on the world map where the round earth surface is shows as a square, leading to precise depictions along the equator but to "false sizes" on the side. And the screen is only a window that gives us a view inside our gaming world, however we can set the view of this gaming world in the settings with the help of the FOV slider, so how does that affect your precision?

Whenever I think or speak about sensitivity, I have 3 scenarios in my head, and I now want to know how relevant the FOV is for each scenario.

Scenario 1: No calculations, no conversations, only 1 game

We all have a favorite game that we play the most and so we would want the best settings in that game, the settings we have in there doesn't need to be converted to another game because this game is all that matters. Does the FOV even matter in this case? We don't need to maintain any consistency amongst different games, because this one is the only we play, so we can go as high as we want right?

Scenario 2: maximum consistency

Doesn't need to be said much, when we want the maximum mathematical consistency between games, actual FOV need to be the same when using the calculator. Tho what actually even is the best FOV for a 16:9 Monitor?

Scenario 3: No consistency

We want to convert between games but don't care for the maybe slight off results when using different FOV, we just use whatever feels right in each game of their own on the expense of accuracy when converting to a new game.

Edited January 3, 2022 by Jega