For instance a parent that would leave a 2-year old alone to go play pokemon probably has other terrible parenting judgement/skills and most likely the environment they leave the kid in IS actually more dangerous than someone who accidentally leaves their kid alone.
They are standardizing risk assessment across all environments, but that's statistics not reality. Certainly some peoples moral assessments have gone overboard (it's crazy that kids can't go to the park unattended when they reach a general maturity). But I don't think it's unreal to assess the risk to a child as higher if you also think their parents are amoral and likely bad parents. Those kids ARE probably at higher risk in my opinion, either from their parents not being as cautious at establishing a healthy environment or in not being good enough parents to teach their kids how to behave in a safe manner when left alone.