I agree with you. I used to be somewhat lax with regard to a parent that spends just a few minutes picking up goods in a convenience store. However, pure science convinced me that it gets hot fast and a tiny baby’s physiology cannot stand said heat.
Here in Charlevoix, in northern Michigan, when I go grocery shopping in the winter, I leave my ‘87 Jeep Wrangler Laredo running in the parking lot. Most other people leave their cars running also. By the way, I’ve never seen a child left unattended in a car in all of the over 35+ years I’ve lived here. There is virtually no crime here to speak of. If a cell phone and packages are stolen from an unlocked vehicle, the news will make the paper .I’ve never had anything stolen or tampered with since I moved here in September of 1976.