What kind of parent leaves a kid alone in a car and walks off?
A distracted parent. An overwhelmed parent. And sadly sometimes a neglectful parent. Take a look at this infograph:
http://www.kidsandcars.org/wp-content/uploads/2019/03/heatstroke-19-map-1.pdf
888 child vehicular heatstroke deaths in the US from 1990-2018. What if the technology existed all the way back then in 1990 to prevent at least a portion of these deaths? We should condemn more children to a preventable death simply because you claim that a technological solution would strip us of intelligence and common sense? Right...