Why you should use "she"

In a previous, I addressed the issue of grammar. In that posted, I insisted on using the words, "she" and "her," as my pronouns as opposed to "he" or "him." I think this is the better way to go. Using the female equivalent of the pronoun makes your sentences more abstract, because it does not imply exclusivity. For instance, the sentence, "A student has to decide which of her backpacks to discard first," seems to imply that the student could be either male or female. "A student has to decide which of his backpacks to discard first," seems to imply that the student is male.