It really isn't, it has been done well countless times before since 2016. This myth has to stop. The only "difficulty" (airquotes) is handling newbies to VR through the initial adjustment period. In which case I wouldn't recommend playing a game like Elite at all before gaining "VR legs". Most people gain VR sickness immunity after a few weeks at most. Some like my wife are completely immune - she jumped right into Onward with no ill effects, I was a bit jealous ;-) I remember times when simply lifting from a pad in coriolis too fast gave me butterflies in the stomach, and not the good kind ;-). Now I can roll and tumble in SRV and not get sick. Some people never get over VR sickness due to some inner ear problems, and some people get sick playing FPS pancake games. Tough.legs gameplay, which is difficult to realize in VR
Unless they're planning a competitive twitch shooter (which will fail badly, due to inexperience in the field and existence of titles with years of experience out there), you can accommodate for VRgins by putting in teleport methods of locomotion and comfort blinders etc. You can also realise it like From Other Suns did - you point where you want to go and your character goes there, without camera movement or wobbling. Also there are a few other tricks, like rendering the nose which fools your brain even more that the things are legit. But that cases are extreme, most of the time offering a teleport + free locomotion method with control over the turn rate is enough.
The VR FPP path has been beaten and it's now a fine concrete sidewalk so to speak. I would be more worried about fps drops in stations and on planets because if that drops too low, reprojection methods can't help and even the strongest iron stomach out there will get sick. And performance never was ED's strong side.
Glossary:
FPP (caps): First Person Perspective
FPS (caps): First Person Shooter
fps (no caps): frames per second