I think @MarcG888 has already answered this pretty well but here’s my 2 cent.
Facebook see’s the social media in VR as a way of making the platform mainstream - Mark Zuckerberg said himself he wanted 1 billion people in VR. From the beginning Oculus partnered with FB to show social contacts in the Oculus Home if you linked your Oculus account to FB, this was way before Facebook aquired Oculus.
So you can see from Facebook’s perspective not having a Facebook account rather makes that difficult. Therefore it has absolutely nothing to do with VR but everything to do with Facebook’s ambition in the social media space and VR is being used in that process to expand FB media interests and collective presence.
I do think @CptLucky8 is spot on, you probably benefit from a discounted product as well (Oculus Quest 2) that might still be too high a price to pay; for some people anyway. Personally I would be ok using my FB account as I have my Oculus account already linked up, but right now I only use the HP Reverb G2.