I actually think there's a huge number of people who want to do online social "world"/ "reality" -- just not without the "3D VR" art. I'm talking like old school MOOs and MUDs but modernized -- or something with a 2d "Zelda overworld" or "isometric" UI even. Something that is less literal, and more "use your imagination."
The immersive 3d stuff is "wizbang neat" to Zuckerberg and investors and gamers. But actually most "regular people" I know don't actually like being "in" such environments. Some people get dizzy and sick. Some people don't like dissociating from the "real" world like that, even for simple 3d games. Some people are visually disabled. Or just don't enjoy the modality.
But more than anything, no matter what, it's always awkward in its immersion and people's imaginations will always be far richer than the uncanny and limited simulated "3d" world that a computer can deliver. Even if you had 99% fidelity, it'll still be a poor simulacrum that often leaves you feeling poorer.
I think Zuckerberg completely misread what his own customer base / world audience wanted because of his own generational biases growing up with technical "lawnmower man" fantasies and fiction, and a misplaced philosophical bias where he believes transcendent, progressive technology leading inevitably in this direction. Because that's what the 1990s and early 2000s was pushing in gaming and other tech. Having billions of dollars at his disposal, and brought up to want and see this future, he saw it as both inevitable and something that he could be pushing the forefront of.
Yes people want to connect with other people in online social spaces. And I think they're probably very excited to do so in a manner which models the thing/place/object aspect of the "real world" rather than the glorified magazine / bulletin board which is Facebook. Especially if they can create and author and extend that world from within.
But I don't think they want to strap facehuggers to their face and do that in simulated three dimensions. And I don't think it's necessary to do the latter to get the former.
(But I'm biased, I've been trying to rebuild the magic I found in LambdaMOO in various forms ... for the last 30 years... https://timbran.org/moor.html )