Enqueue stylesheets in child theme

Hi,

I have noticed I should not use the @import to include the parent stylesheet. I should enqueue it in child theme file functions.

function child_styles() {
	wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );
}
add_action( 'wp_enqueue_scripts', 'child_styles' );

But today I found out you should enqueue the child theme stylesheet as well. My site looks fine without this (child styles are loaded) so I am wondering why I should enqueue this too?

Guido