A computer won't be speeding on a residential street. It will identify a child standing on a curb for tracking but otherwise not react to it until it determined that the kid's trajectory would likely intersect the car's. In that case it would break as hard as it needs to bring a car to a quick and safe stop.
It probably shouldn't be going fast enough in the first place for it to be an issue in suburban situations. It should be able to react in time even if a dog/child appears from behind a large parked vehicle. This should also be true of human drvers, but probably isn't.
But yes, deer beside faster roads etc. should probably trigger precautionary measures to ensure reaction times will be sufficient.
I surely hope that we will be much less forgiving of machines beating our children to death because they had the temerity to play in front of their own house, then when adults beat children to death because they had the temerity to play in front of their own house.
It's despicable that anyone thinks it's acceptable, but it's different to say "you aren't allowed to beat that child to death when you're trying to get home after an exhausting day of work" than to say "Google isn't allowed to beat that child to death in order to sell a few extra taxis".
Because people and, perhaps, objects that can't be readily distinguished from people stand on sidewalks and at curbs all the time without an intent to walk into the street. There's a fine line between defensive driving and driving so conservatively that you're constantly applying brakes because "something" might happen.
Because a human driver slows down in order to account for their reaction time and ability to continuously track multiple objects around them. Basically, they know that by the time they realize the kid is about to get run over, it will be too late to stop. Computers are already much better at tracking things and reacting to them with millisecond precision.
(That's not to mention the usual disregard for traffic rules - and thus basic safety - an average human driver has, which other commenters have touched on.)
A computer won't be speeding on a residential street. It will identify a child standing on a curb for tracking but otherwise not react to it until it determined that the kid's trajectory would likely intersect the car's. In that case it would break as hard as it needs to bring a car to a quick and safe stop.