This is my biggest fear: no longer being able to create individual accounts that are not Oauth'd through social media. I don't think my bank will require facebook any time soon, but I hope laws are in place to prevent it when the time comes. Sen. Wyden, I hope you're listening.
I can understand the store aspect (even though in a perfect world you could buy apps and games without DRM and having to log in), but why would you need an account because something is a standalone device? What's the difference if there is a cable attached?
Quest is not a screen. It's a computer with a built-in screen. iMac for your face. Quest with a link cable is still not a screen, but a computer running a kind of "remote desktop" software.
The computer part needs an account. Virtually all software for it is paid, and it is genuinely helpful for non-technical users to have a "cloud" account that ensures they won't lose their games even if they sell or break the device.