Everyone has a right to bodily autonomy. They have a right to make informed decisions about what is done to their body.
But we live in a society that says children's bodies are the property of their parents, so as long as the parents want to force conformity, it's a-ok to ignore a child's right to their own body.
Gender-essentialism is violence. Gender essentialism demands the sacrifice of intersex bodies in one way or another. Intersexuality cannot exist in a gender essentialist's world.