I think there's probably fault on both sides. Kids are raised with no fear of anything (including consequences of their actions), and since none of them listen to their parents at all anyway, they have no reason to not run into traffic because why not? Meanwhile, we now have a ton of asshole drivers who think they own the road, text while driving, feel they are too special for road signs/laws, and are generally total space cadets behind the wheel. This is a very bad combination and can very easily result in people getting killed.
Why was the driver so disconnected from their surroundings that they not only didn't see the kid in the road, but also didn't even realize they hit someone? I'd also like to know if the kid actually attempted to be safe or if they just wandered into the road because they felt they were invincible.
I always slow down if I'm driving and there are kids on the sidewalk walking or biking because I don't trust the little turds. Even kids who are old enough to know better could very easily bolt in front of me without warning and I need to be ready to stop. I refuse to get charged with vehicular manslaughter because of someone's brain-dead sprog Darwinizing itself on my hood.