By using terms specific to the subject, the author shows a greater understanding of the topic and the audience will know what the author is trying to talk about.
Without using terms, you would sound like you dont quite know what youre writing about.
is a 101-year-old poem that tells the haunting tale of a shadowy supernatural being beset by other ancient evil things. It's told in Lovecraft's recognizable way, where he says a lot of creepy things but doesn't actually tell you anything..