I don't mean to suggest that there's nothing to be done or that having society provide you with community is the solution. Just that it used to be that way and we're in a state of transition.
No one is depriving these people from joining the same organizations today
Right. But I'm saying that previously you were raised into an organization. You pretty much had no choice but to be a member of whatever group your family had been a member of. Now we've got a more free-form society and finding a group takes effort. And because you're not being forced to stay in by societal expectations, it even takes effort to stay with the group.