I can understand the reluctance to allow the bible question through, as the data in question may not be truly open. As I understand it, not all bible versions are in the public domain, and at least one of the sites that I found (in answering the question) did seem to have a "non-commercial use" clause attached to their (quite sophisticated) APIs.
Having said that, assuming the bible content in question is indeed "open" (does public domain = open?) and free for anyone to use, then I see little distinction between textual bible verses and, say, historical weather data. What if a researcher was interested in accessing bible text programmatically via an open API in order to analyse the language, word usage, and so on?
My opinion is that open textual content should not be treated differently than numerical data.