People IMO are by&large smarter / more educated today, than in the past. And , likely less naive , as such less likely to believe , or need to believe stories, and use these stories as a crutch to prop up their lives. They do not need the guide for their own life.
Add to this all the unnecessary death, natural devastation & such that we see everyday , and their "faith" is strongly tested.....doubted.
And the biggie IMO, is the now global,... priest scandal Start messing with folks children,...and keeping those folks on your side, in your "fold" is not going to happen.
I personally know two guys & their wives that were devout Catholics . Both of them just completely walked away from the church/religion because of the aforementioned.
My mother suggested religion/church in my youth, but never was 'over-the-top' about it. I tried, but it just never took hold with me. My feeling has always been,....Considering all the religions that there are, they can't all be right , therefore, IMO they're all wrong, and just selling their agenda.
I think the beginning of the end [of religion] with me was, when a innocent little six year old girl [neighbor] was diagnosed with leukemia , and died shortly after. I asked my mother why, she said of course that she did not know, I remember asking something in the direction of why God would do this, again she did not know.....that was when I started doubting, having a hard time believing ......I was about eleven at the time.
Last time I was in church was at my friends wedding ..........that was 40+ years ago.