If that is such a great idea why is Quest doing so extremely well compared to PCVR right now?

I think the issue is more that we need both. There will not be any incentive for anyone to make any VR software if there are not users and clearly even the current VR headsets are of interest to enough people that you can build a market if you have a price they can afford.

Meta exclusively focusing on Quest and dropping Rift completely was what really was bad for VR.