There are some people who legitimately love VR games like VRChat. I am not one of them, but I have talked to a few. At the time that Facebook made it's initial investments into that space starting in 2014 there was at least some possibility that those people were the early adopters of a technology that would disrupt the social media and entertainment industries. Of course that turned out to be wrong (or at least too early) but at the time it wasn't completely implausible. Large enterprises sometimes have to invest in long shots as a risk mitigation strategy.