I recently ran across a video advertising a church by talking about why people don't attend. It was interesting to see what they thought were the big reasons. I don't think the reasons they gave are poor, just incomplete.
If religious institutions cannot or will not see the light by accepting and responding what really keeps people away from their doors, they are going to have smaller and smaller numbers who tend to look, think and sound alike.
To quote Guy Kawasake from his book Enchantment, "A diverse team helps make enchantment last, because people with different backgrounds, perspectives, and skills keep a cause fresh and relevant. By contrast, when a naked emperor runs a kingdom of sycophants and clones, the cause moves toward mediocrity."