My entire issue with having to sign into FB or Meta is that the entire company makes it's money mining your data and targeting you with ads.
We all know damn well that while using Oculus they will be recording, logging, and noting everything you play, say, do, and everything in between which will then be passed through their algorithms and subsequently passed onto advertisers as well. I know you have some control on the privacy side of things, but you can't control everything they mine about you, they will mine it because you agreed to their privacy policy beforehand which allows them to do so.
This is exactly where the issue lies for me. Why the hell should I fork out the money for the headset only to have them mine my data so they can sell it off to make even more money throughout the time you use that device.