Thing is, pubs can be unwilling to take a chance on non-mainstream C-fic. It's worse now than it used to be because of your sentence above, the one I highlighted in blue.
In my generalized opinionated opinion, C-fic pubs appear to think their readers want only a certain type of book. Amish romance, for example, which is still popular. Of a 4-sided rotating carrel I saw in May in a C-fic section, one side was super-positive-happy Christian self-help, one was Bible studies, 1-1/2 was Amish romance and the other half was non-Amish sweet romance. (I have nothing against romance. One could say the same of cozy mysteries featuring cats.)
So, if the pubs think AMISH ROMANCE! and acquire only Amish romance and stores offer only Amish romance, C-fic buyers may think, "Oh, well. At least I know it'll be Godly." And the cycle continues.
Even C-fic "romantic suspense" might have an uphill climb in the mainstream market. I vividly remember Barbour's guidelines from 10 years ago. They've since taken them down, so I don't know if they've changed. But back then, the rules included: No character may drink, dance, or attend a Hallowe'en party. If a character (even a villain) needs to tell a lie, it must be cleared with the editor. At the end of the book, MMC and FMC must both belong to a Bible-believing church.
That's when I jumped over the canyon to mainstream.
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