Override default address fields – woo commerce

If you have the American version and want to change it, the code below will do this. Why does woocommerce not have this as an option?

Before

//change address defaults
add_filter('woocommerce_default_address_fields', 'override_address_fields');
function override_address_fields( $address_fields ) {
// $address_fields['address_1']['placeholder'] = 'Test';
$address_fields['address_2']['placeholder'] = '';
return $address_fields;
}

After