As a man with a full time job (remote), a wife and a kid under way I cannot really fathom having energy for more social activities (except meeting some friends or family at most once a month, reluctantly). Am I a hikikomori? I kind of relate to them.
My wife also doesn't meet anyone else ever.
Now that I think of it - neither do our parents or most people living in their village. It's all work + church at most.
Maybe as humans we don't really need social interaction THAT much? I mean how do you explain people who seem to thrive living off-grid? We do need jobs and some basic communication skills for sure at least to maintain the current standard of living but maybe not for socializing. Some comments here kind of sound like "extrovert propaganda" - same people who cry for the return to office because they cannot imagine that people can live differently.