I kind of agree. I have the same issue, although I'm not prone to motion sickness in life. My senses get ready for g-forces which are not there so my whole nerve system goes brrrrrrr. Then I need to put in mental effort to stop expecting motion and just concentrate on the visuals which ruins the experience. An hour in Digital Combat Simulator with VR is my maximum, and I usually need a recovery period for my internal gyroscopes to get in line.