It is a machine you literally have on your head. I have not tried it, but I can believe that it requires some different UX considerations than normal computers. I would definitely not like to hear fan noise vibrating through my head.
There's a reason why the Vision Pro has separate chip that handles the real-time passthrough from cameras (and bunch of other sensor-fusion stuff, AIUI).
In the old days, the device settings would allow the user to tune the trade-off to their own preferences. But current user design orthodoxy is that "settings are bad" to an extreme (I actually agree with the weaker formulation "too many settings are bad"... for some value of "many")
That really depends on what the effects of the throttling are. Stronger foveation or other rendering quality drops? Probably OK. Frame rate dropping below 75? Not in VR, never...
But they're a trillion dollar company because of their relentless focus on the end-user experience which you happen to dislike, but which most people love.
UX isn't NVIDIA's business model. It is Apple's, and they've found there's shittons of money to be made giving a shit about UX, especially when virtually no one else will.