Meta definitely isn't focused on fidelity and graphics. Their mobile VR push degraded VR graphics significantly.
But, they do still support that type of user with AirLink/USB. Problem is, there's not enough of those users, so many of the developers target Quest users, which where the eyes are.
I think a step function in VR quality, which requires a step function in the number of eyes behind a powerful system, will come with PSVR 2.
Also the current generation of VR was basically build on top of smartphone hardware and there where quite a few ideas to make use of the full hardware instead of using it as a dumb display.