>To maintain your balance, your brain relies on signals from multiple sources: your eyes, your muscles and joints, and the vestibular system in your inner ear. Most scientists think that motion sickness occurs due to "sensory conflict" — when your vestibular system and muscles tell your brain that you're moving but your eyes send the opposite signal. Those mixed signals cause some people to feel dizzy and nauseous. And depending on genetics and other factors, some people may be more predisposed to motion sickness than others.

https://pubmed.ncbi.nlm.nih.gov/25628336/

I gave my DNA to the Jews and they confirmed that I am genetically predisposed to have motion sickness. I love VR but I can't play for more than 30 mins.