Yeah, from what I've heard it's extremely rare that the LSAT essay is looked at. I've heard that they might use it to check your writing style if your personal statement seems plagiarized. I also heard a dean say that sometimes people try to make a joke of it or draw a picture or something stupid, which is not looked at favorably. Don't worry about it. Maybe read a couple of the past essay questions so you have an idea of what to expect, but even if you're not a great essay writer I don't think you'll find it intimidating or difficult.