This was one old naive idea, fortunately, it was discarded, Nvidia has support for Multi-View Rendering in Turing and Single Pass Stereo in Pascal, why ED doesn't want to implement this is an incognita. The official answer was that ED wants to be platform agnostic, I call it mediocrity. Unity is implementing a similar technique and not limited to Nvidia.
Unreal Engine and Unity are using Hybrid Monoscopic Rendering to accelerate Oculus GO and Quest with very good results.
VR is already there, we only need developers to move to the next level.
We should observe that the game is heavy CPU bounded, maybe they should start fixing that. The whole experience will improve and not only for VR players.