" It just means people do not conscientiously see value in these social structures. "
I think this is the case with many here in the U.K, yes, we have over 50% who say they are not affiliated to any religion, but that does not tell us about the beliefs of those people, some will be non-theists of some stripe, but many will still believe in some sort of god, or a vague "Higher Power".
But this is encouraging, that throughout Europe, and to a small extent the USA, the grip of Organised Religion is loosening. People do not see the need to be affiliated to, or attend a Church.
Let us hope this powerful trend continues !