You can't not use pronouns. It's about using the correct ones. Why do some people think pronouns are new? "You" is a pronoun, for example. It has nothing to do with gender.
Even if you disagree, using a pronoun is just polite.
It may have just been a typo, but I'm seen far too many people who think pronouns are a modern invention that has to do with gender identity. Sorry if it was just a mistake.