The ST:TNG holodeck was a crutch for bad writing. It was even worse than ST:TOS's time travel.
I hope the XR future is more creative.
The point of useful technology is to make things more convenient. This is less convienient than typing queries on a keyboard, even if there were no HMD involved.
If Einstein creates some 3D graphs or plays a simulation to make his point, it will be more convenient to already be in that world.