> Because no children would ever die in an accident involving public transportation?

I apologise for an appeal to "common sense" since I really don't have any data, but it seems sort of obvious that it would be safer for two reasons:

1. There's almost always other people there, so someone is likely to warn you that you abandoned your kid.

2. Your kid is there with you, so it's not like you have to remember them.

You're trying to make the argument that "a few kids being locked in cars every year isn't that significant in the larger picture". That's a different argument than "the reason kids are locked in cars is because people are driving in cars".