Your point is? I don’t know of anyone that thinks 9 mm is a good moose hunting round. I would be very surprised if moose is even legal to hunt with 9 mm. And, if I recall correctly, you are referring to the case where someone shot a moose with a 9 mm handgun - several times - and the moose went down. Not sure what the final outcome was - very slow death of the moose?
Sure, we can all tell of times when people or animals were killed with low-powered guns and ammo. But, I sure wouldn’t bet my hunt or my life on such underpowered guns and ammo (underpowered given the size of the target versus the ammo used).
9 mm is ok for self defense against humans - this is well established. The example I gave about the police officer was really more about shot placement than caliber. Had he been shot in the same place with a .45 acp, the results would likely have been similar. I mentioned 9 mm because that is the caliber that was involved in that shooting. And, my wording should have been clear that I was saying “even with 9 mm” - meaning, even with a normally-sufficient round.