I actually think the real issue is that VR is using a static, forward facing centered eye position, and then displaying head movement.
However, our eyes are able to move and I think this is giving us the problem that turning all the way around is not required in real life. We can, IRL, turn our heads 120 or so to the left and then our eyes can go a bit further to give us the 180.
Early days though so I am sure they (VR manufacturers) will address that issue at some stage