That link does no such thing. It points out the failure of the churches to serve the needs of the members who wind up leaving. The ones that stay point to well managed churches and good pastors as leading factors.
Science: to presume there is no God, and then to try to plumb the nature of the cosmos results in theory that displays the limits of our own minds rather than reality. Results like “big bang” offer no information about beginnings or endings or even if there are beginnings or endings. Or the primordial chemical soup struck by lightning and voila! - life! As if that actually answers any questions, it just leads to more assumptions (why are the assumptions of atheism better than theism? They both are assumptions and have their own justifications, none "testable" by scientific means.) - which is why philosophers wear long robes that cover their feet - they don't want you to see that they're not really standing on a solid foundation; like their ideas they're just floating on air. Or take environmental science - secular assumptions are that the way things are is "natural". Christians know that the world is "turned upside down", not in a natural state but a fallen state; cursed by death and all that brings - to Christians the "natural" world was that which existed before the Fall and cursing. So to make assumptions of what is "natural" is a matter of Faith.
Economics: As in history, God's sovereignty cannot be left out if one is to grasp the true nature of things. True wealth and blessing without sorrow are from God Who gives as He will. "Blessed is the nation whose God is The Lord". But what does a secular economist come up with? Communism/Socialism - an economy of mass production requiring mass consumption (including food, which is the why of obesity?). Secularists postulate a world of limited good in a cosmos of entropy. Like a fire, eventually the fuel and air are consumed leaving only ashes. That sounds like our cycles of boom and bust, not to mention what we're left with by socialists.
But with God not so, He upholds all things by the power of His Word - including whatever nations He chooses to bless with prosperity.
There is just no excuse to leave God out of our education. But that is the trajectory of history as shown by the Bible.