These cases should be treated as murder - at the very least: manslaughter. I don't care how stressed or forgetful a parent is. They should not be given a pass to kill their own children, from negligence or whatever.
Do you have children? How many? Or do you have none?
If you have less than 9 kids, STFU before passing judgment on those of us who do.
If anyone is qualified to pass judgment, I am the one. I stayed at home until it was not longer possible to do so. My younger kids have not suffered because they spent some time in daycare.
Working to support as many kids as you want to have is not a crime.
Leaving a child to suffocate in a hot car is murder, that's a crime.
Learn to tell the difference.