The usual reason is, Because it normally doesn't happen. And also because the save file contains some - but not much - informations about the game itself.
And you said the magic word: "sometimes". That's bad for every dev. In that case a save file, where it actually
did happen, helps a lot. In that case the save would have informations about the flags that lead to that situation.
It might have taken less time to just post the file

These are no spies from [insert bad boys country here], they are just trying to help.