I hate the people that complain about this essay just like I hate the people that complain about the "Why Penn" essay they neglected to write just before getting their ding at Penn.
People, you're applying to law school. It's reading and writing. Get over it.
Second, it's their application, and if you feel put off by it, you're not a match for the school anyhow, so move along. Somewhere out there, they find not only enough students to write the essays, but enough to do well enough that they accept them, and (gasp), they go on to attend the school.
It's not a book report; it's something to get some insight about your personality. Of course, that's probably what you're worried about if you're someone who can't be troubled to write a couple of paragraphs.