If parents refuse that then the child needs to figure out that they were born with the f**king organs they get and it's literally just words based on their anatomy that are used to easily identify them more.
Pronouns aren't a phone wallpaper, they can't just be customized
They're used to classify the human race properly.
LEARN people
We can't end stereotypes by creting more subsections of humanity, only by treating the existing ones equally