having a moment here in gnome
to everyone pointing out that this is for touchpads;
a: it’s awful on that too
b: note the mouse in the example given
If you imagine the mouse strapped to the back of your head, then moving it up would tilt your head down, but it would also tilt you head left when you moved it right. So if you want to use realism (in this mouse behind the head scenario) as an argument for inversion then you would need left and right inverted too.
However, if you strap the mouse to your face, now if you move the mouse up, your head tilts up aswell. If you move it right, you look right. And given in 1st person games the camera is at the front of the head, this is why non-inverted is preferred.
The only argument for either is personal preference and more people prefer the latter, non-inverted, which is why it is not the default.
