Actually... I think I understand you perfectly. You want to charge parents with negligence when anything bad happens to their children that YOU are quite certain you would have never let happen because it makes you feel superior to judge people. YOU would never turn around in the grocery store to find your kid was not following you like he was supposed to. YOUR kid would never wake up in the middle of the night, open the front door and walk outside. YOUR kid would never set the house on fire making toast.
You are probably also the type of person that would sue Walmart because their parking lot was dark at 2AM and you tripped because they should have had better lighting.
How about instead we accept that sometimes shit happens? Sometimes we trip. Sometimes the toy/phone/laptop we are using randomly bursts into flames. We don't need to send someone to jail or take away their children every time something bad happens. We don't need to assign blame for every little thing. Accept that shit happens and life is dangerous. Life is full of risks that we take everyday.
Instead there are children suffering from REAL abuse and neglect that we are ignoring because we are too busy trying to decide if letting your kid hold a phone constitutes neglect. This kid has loving parents that can give him things like a state of the art brand spanking new phone. There are kids whose parents leave them alone while they go off and get high or drunk. There are kids who do not have food. Worry about those kids, not this one.