Not everyone who goes to church and/or professes faith actually believes. According to many Christians here, most professing Christians aren't real Christians at all--but they still gain access to one of the biggest old-boy networks ever.
Hell, I went to church nearly every Sunday my junior year of high school in an attempt to get laid. I guess that attendance would have been a plot point in someone's "believer's profit" proof of God...
Yes.
Whither pointeth the causality arrow? Perhaps feeling healthy, wealthy and socially embraced manures belief in a benevolent deity: blessed are the smug, for they shall inherit the magic beans of Prosperity Christianity.
"If you can keep your head while those around you are losing theirs, you can collect a lot of heads."