Crazy eskimos
In the States we have things called sidewalks - those are for pedestrians and they have laws they are expected to follow. A person stepping from a sidewalk should do so at a marked pedestrian crosswalk. (which was clearly indicated as not being the case here)
They should look both ways, make sure traffic is clear, and clear the intersection.
Cars, must always yield for pedestrians in crosswalks, and generally should always yield for pedestrians. But, a tree falling out of the sky onto your car is not a preventable accident. I was on a road once that I knew deer were sometimes on. 55 MPH speed limit - I was driving 50, and paying attention. Deer jumped a 8 foot high fence, charged down a hill and ran into the side of my car!
The only way to prevent all accidents is not to drive, and to cast blame is often just silly. Accidents are just that - accidents. You drive along, a flat piece of metal is in the road you can't see, it pops up and blows out a tire, you lose control and veer off the road striking a person. Whose fault?
There are most definitely not laws that say you must slow down when passing a pedestrian on the sidewalk in the states that I have ever heard of. Even if the guy did slow - to 40 or even 30... if the kid just stepped out in front of the car, he is just as dead.
Very sad for the family AND the driver. I would be struggling if I ever hit anyone.