Grand Prix Legends is a Sim made WITHOUT an adjustable FOV. GEM+ is an addon. Having an adjustment is not a problem, but suggesting a strange FOV is an enhancement is, when it inhibits normal vision Online.
After some thought to these very different game FOV's suggested, I believe either their modeling is quite different, or perhaps the texture renderer takes a different slice out of the internal view? It's also possible not all who suggest this stuff, understand the human eye. They do not suffer if you crash more often, or hurt your eyes from viewing too close.
I've a 2D example which all will understand :
The artists who help make our racing machines, post images of their work on our private Forums. A beautiful new wheel may have bright sunlight only at the top. Nice photo . . . many compliments . . . until you go race. Then you find the Sun turns upside down at the first turn. Not usually possible until many other car parts turn upside down.
This is 1D thinking, where 2D was needed. Many guys use 2D thinking for this FOV subject, where 3D is needed.
I thank Cookie for helping with this well mannered discussion. A good discussion needs . . . different viewpoints. There is more to learn when different ideas are put to the test, rather than finding a team of salesmen, all re-telling the same story.