
Imagine you meet someone called Jack and, because of their chosen clothes and style, you’re not sure of their gender identity. Imagine then having speak to another person about them. In that instance, knowing their personal pronouns will enable you to refer to them correctly, not make an idiot of yourself, and save embarrassment all round.
Indicating your personal pronouns is an act of courtesy. Respecting someone’s personal pronouns is an act of thoughtfulness. No one is forcing it on you or anyone else. It’s nothing to get annoyed about. It’s about being better human beings, understanding of others.