Pronoun

Lawyers don’t like pronouns because they (pronouns, that is, not lawyers) tend to be shorter and more idiomatic than repeated use of the nouns to which they (the pronouns, not the nouns) might, if they were used, relate.

The official excuse has probably something to do with imprecision (“he”, “she” or “it” can ambiguously refer to the subject or object in a sentence: unlike those ultra-precise Germans, we Englanders don’t decline our people, places or things) despite the fact that they work perfectly well in any other linguistic context. Lawyers have their own form of pronoun - the defined term.