Gotcha. I'm like the Zuck in the sense that I don't get sickness in VR, so I forget that it's a major issue for most other people. Full joystick locomotion with all the motion sickness assists turned off is the only way to go for me. (They break immersion.) I never got headaches from 3D movies and games either. I really miss that era of PC gaming because the glasses were a lot less cumbersome than a headset.
I feel really bad for those who have motion sickness issues with games; happened to me one time when I was drinking too much one day and then made the mistake of hitting the live resin. So I completely get why those who suffer wouldn't want to touch VR. I sure wouldn't if that was my normal experience.