I tell you what, some of the most incompetent "experts" in the entire pro sound field work for companies that specialize in sound reinforcement for "houses of worship." They know that a lot of the people signing checks for churches don't know jack about music or P.A. and they exploit that for everything it's worth. When my church was building their new worship center the Building Committee (which included none of the worship team members BTW) swallowed the "audio consultant's" recommendation hook line and sinker, despite concerns raised by several of the worship team musicians that there were some serious fundamental flaws in the design (e.g., all subs flown 30 feet in the air and no subs at floor level). As a result we wound up with a sound system that had many of my musician friends visiting and saying, "nice looking stuff but it doesn't sound very good." Dead zones, bass traps, hot spots, slapback... you name it. Just a hellacious room to listen to live music in, and even worse to play.
Fast forward, last year we finally brought in a different guy (who does P.A. for all the big time bands when they come through as well as all the major local festivals), and the first thing he said was, "you need to get those subs on the floor." We traded in a bunch of the stuff on his recommendation, re-configured the arrays, and wound up with tons better sound (at FOH and on stage) for less money than we spent originally, using fewer cabinets and less wattage.