Yea, requiring an online account to use a head mounted display makes as much sense as requiring an online account to use a monitor.

Sure, require an account to do purchases through their online store, that makes sense. But why on earth do you need an account to use an unconnected piece of hardware? I don't need to log in to an account to use my monitor, mouse, keyboard, or joystick.

EDIT, answering my own question:

The only reason these accounts are required is that Facebook wants to pretend Oculus is not just the HMD but also the whole "ecosystem" including the store, their toxic social media properties, and their ridiculous metaverse. I don't buy into this fantasy of theirs, and will never buy another Oculus until they are treated as dumb displays.