For the believers only position says fundamentally we are to have a “regenerate church”, at least hypothetically speaking, “HERE and NOW”. It attempts to “drag” the Kingdom into today as quasi consummate and final status, just like the Judiazer’s did and just like Rome attempted with “Christendom”, hence a hypothetical pure regenerate Kingdom.
Dr. Scott Clark has a term for this:
The Quest for Illegitimate Religious Certainty
We all have this quirk as you pointed out. It is a temptation of man to make everything nice and tidy. It's really a kind of fig leaf isn't it?
Good post sir.