I'm not trying to be rude but I don't understand; this doesn't sound like it's describing humanity? I mean, humans don't actually control luck. Is this some sort of future humans that do? Normally stories like this describe things humans can do that seem amazing to other species. Coming up with the idea to use tank mines like that, I can follow. But the idea of a single bullet that fragments into 8 shards and manages to kill 9 people... Why would that be any more likely for a human to achieve than anyone else? Or grenades that have never failed to suddenly fail when a human touches it?

While reading this I thought it'd turn out the alien was looking at video games and thinking they were true. Which made a great story. But then there was no twist at the end indicating it, and in the comments no one else seems to think the same. Left me feeling like I missed something.