The case of Jassiah Clark is far different. His mother is drug user who was getting high when he disappeared, scoring drugs. She let him play OUTSIDE unsupervised for hours, on not only the day he died but all the time. She also lied to police.
Drug usage typically is at play in negligent homicide charges. Lying to police and a pattern of inattentiveness also plays a part.
As to running a red light and killing someone being "negligent homicide", it depends. Most involuntary manslaughter/negligent homicide cases involving running a red light UNINTENTIONALLY, also involve illegal distractions such as talking on the phone or texting, or something else illegal, such as speeding.
And being at the wheel of a 4,000 pound vehicle, and doing something that is illegal, like texting or speeding, causing you to break another law and ultimately causing the death of an innocent, is simply different than an exhausted mother taking a nap in her home with her kids, one of whom is awake and watching tv, unless there is something else at play, such as the child has autism, is known to get into trouble, the mom is passed out, high, etc.
It just is. It's different. 4,000 pound vehicles will absolutely, certainly cause injury or damage if they hit something or someone. It is not certain that a 5 year old child left awake while mom naps in the same home will become injured.
The law is pretty clear. I cited it. Please cite to evidence that what I cited is bad law.