Meh? Everything you described has been occurring over the internet for 30ish years already. We didn’t need Facebook or VR for it.
We definitely don't need fb. VR though, is another mode. We don't necessarily need it, but having it does give us something new.
For hanging out with a younger sibling, zoom doesn't work too well. Video (or audio only) calling enables only a certain kind of interaction. In the physical world,we play tennis, have dinner, cook together, etc. We don't just sit in front of each other and talk intensely all the time.
VR opens this up a little.