According to a study published in the Atlantic, 47% of Americans belong and attend a house of worship. So, are you saying more than 47% of Americans are going to AA meetings.
And those attending church are a significant but not total measure of the number of Christians.
So, let's be honest and not exaggerate. It is true, total church membership is declining but far exceeds the number of people joining AA.
In addition, a growing number of people have rejected traditional church institutions in favor of "home" and online churches focused on God, the Bible, and fellowship.
My daughter and her husband belonged to this type of "church" comprised of less than 10 families. Meeting once a week on Sunday morning to worship and once a week on Thursday evening for Bible study. In my youth, I rejected "institutional" Christianity and like my daughter attended Bible studies that were focused on God and not church politics.
Since Covid, but even before, the number of people that "attend" online church services have increased dramatically. When we have inclement weather (rare), my wife "attends" an online service not connected with our church.
As the population ages, more seniors "attend" online churches as their mobility declines. The ease and range of options have exploded thanks to streaming internet vs the traditional cable broadcasts of the past.
But Christianity is not about numbers. Those who believe it is, are largely focused on the political impact of Christians as an "identity group".
Even then they are confused. 45% of Catholics vote Democrat and 40% of Protestants vote Democrat.
Christians believe in God and Christ. That is about all they agree on. These beliefs for most Christians are rooted in the idea that God is the Creator, desires to have a relationship with man, and that man needs to be made holy (since he is a sinner) to have that relationship. Even that narrow criteria, is not universally agreed to by Christians. Yet I laugh when I read things like Christians believe this or that...