Sorry, don’t buy it.
I don’t buy it either. Maybe 1 in 100,000 might be accidental, but it is the rare, rare exception.
Neither do I. If you have a baby, if it is in your custody, it’s the highest priority and the most important thing in your life (or should be). Leaving it in a car, hot day or no, is nothing but criminal negligence. Some people shouldn’t even be allowed to have children.