the sickness happens because your brain cannot correlate what you see and what you feel, it more or less happens when there's actual movement involved in games (that is why most games by default do not let you turn with the analogue stick, but rather move in X degree increments while blanking out the screen for a moment. It would not be the case when you're basically just looking around, but not moving. I recommend SuperBunnyhop's video on YouTube about the issue!