There's a lot of innovation that has to take place to get the price down and to have a unit that has everything inside the headset. In fact those are probably the 2 things that have to happen before mass adoption. There is never going to be a significant market for VR headsets that you have to hook up to a gaming PC.
The manufacturing cost for the Oculus has to be far less than the Index since Valve reportedly isn't making much off their headsets. For argument if we say Meta's costs are $400/headset and Valve $900/headset, that still makes the Index over twice as expensive and it still can't run anything without being tethered to an expensive PC!
I don't know how you could seriously try to argue that kind of price undercutting isn't "innovating".
I wasn’t looking so much at cost as much as capability to innovate.