Many schools have become super restrictive on how many essays they allow you to submit. The crushing numbers of applicants has forced schools to streamline the evaluation process and they simply do not have the staff or time to read 1000 word essays from everyone.
Harvard, as an extreme example, actually has no required essays as part of this year’s application! They allow you to submit one essay if you like, but it’s not technically a requirement for consideration as an MBA applicant. While we don’t recommend you submit to HBS without leveraging the essay, this shift in the process highlights the fact that every word does indeed count.