What percentage of Roman Catholics do you believe could do this truthfully?
Enough. And if you don't, why belong?
I believe A.A. is referring to the Church hierarchy, responsible for properly instructing their faithful.
"I believe in One, Holy, Catholic, and Apostolic Church.."
That ONE refers to the UNITY of Worship, Doctrine, Authority
That too few Christians can honestly profess the Creed is nothng new. That too few Christians witness to their words with the orthopraxis of their actions is nothing new.
Nevertheless, that is what a Christian asserts publicly when he says gthe Creed. Maybe some ought to shut-up when the Creed is being professed if they don't really believe it.
Doesn't really matter; one or one million, the truth is not dependent on belief, it is what it is.