What is the point of any art that isn't instantly intelligible?
And I think you do a slight disservice to choral music, there. Assuming that you're commenting on the prevalence of Latin texts, there are quite a few people in this world that speak Latin, and there are such things as translations too.
Of course, if you're suggesting that people simply can't make out words when they're sung by choirs, I'd suggest that you've been listening to some bad performances of choral music
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