well i guess public opinion has spoken
i did add it, because i wasn't positive of what the secondary questions would be, and also because i wanted those schools to know i didn't merely apply to osteopathic schools without a thought as to what it is. it is obviously convenient to copy and paste the same essay, but i figured i should add a paragraph on why osteopathic medicine specifically suits or interests me. in my opinion, the argument of why duplicate it is similar to asking why have a cover letter, a resume, and an interview, i believe reinforcement of specific, relevant details is important.
furthermore, now that i think of it, the secondaries i got asked "why ___ ___ College of Osteopathic Medicine as opposed to other schools" and thus I focused more on the school itself.
anyway, its the op's call, but obviously its not mandatory or even signifcantly different in outcome potential.