When I was a little girl in pre-Vatican II days (what many of you call "the good old days" and what I call TGI2015) we were told that if you were baptized you had received "the gift of faith" and that if you rejected "the gift of faith" and joined another Church or left Church entirely they would go to hell (ah, yes, the good old days!) but that other Christians who hadn't received "the gift of faith" would be off the hook! It made me feel like the kid who got a lump of coal for Christmas instead of toys!
When I received Confirmation at age 11 (the beginning of Vatican II) the nuns told us that if the Communists came to our homes and asked if we were Catholics that before Confirmation we were off the hook! But after we made our Confirmation we'd have to own up and get dragged away! (What an incentive!) Ah, yes, the good old days you dream of so fondly!
They weren't so good, were they?
I walked down to my Confirmation like Wendy in Peter Pan walking the plank!
So no wonder why, having been threatened through their childhood, people stay Catholic even if the fervor isn't there (because of--as I erase another misconception you have of the good old days--poor catechisis! If what we went through wasn't poor catechisis, what was?)
The solution may be to stop bullying and lying to children
Yes, some of this is tongue-in-cheek, but it's all 100% true. You look at the pre-Vatican II days through rose-colored glasses. My childhood stories of the Latin Mass and the threats of Communists dragging us away are the unvarnished truth.
The good old days weren't so good--and the catechisis wasn't so good, either.