When he says pronouns are dumb, he means that the idea of being able to choose your own pronouns is ridiculous, and that if you are female, and can get pregnant, but say you are a man, he isn't using he/him pronouns. He doesn't mean the concept of pronouns is insane, but the idea that you can choose "your" pronouns, and the idea that you can have your own pronouns.
Bu anlaşmazlık ilk yanıtlayan siz olun.