Why are you requiring Facebook accounts to use Oculus devices?
Oculus is owned by Facebook and is one of Facebook’s apps and technologies. Using a Facebook account provides a single way to log into Oculus devices and makes it easier to find, connect and play with friends in VR. It also enables Facebook-powered social experiences, like live streaming gameplay to your Facebook timeline, making calls with parties, joining events, and exploring new experiences like Facebook Horizon. And as Facebook adds new privacy and safety tools, they can be added in VR too.