Just wondering, what is the point of these stories?
The only way to get any kind of idea how an actual factual real world defensive gun use might happen or play out is to learn of actual factual real world defensive gun uses. Because it most surely won't be the way movies/TV portray it (that is if they stop pretending it never happens long enough to include it in something that isn't end of the world).
Sure, you don't know the validity for sure in this context, but...yeah, that ^ is a reason why.
But keep in mind also that many people choose not to discuss it or even say it happened because of liability and/or they simply don't want to.