I love the whole “Humans are the Weird Aliens” stuff but, like, consider.
One of our future goals in medicine is to be able to perform transplants with no problems, and many people donate their dead bodies for such a thing. Furthermore, we’re resilient as a species and won’t lose a fight until we die.
So a few hundred years from now, we’re integrated into the galactic community, and you don’t want to fuck with a human. Even if you cut they’re arm off, they’ll just take the severed arm and beat you to death with it, and then go to a hospital to get an arm donated by a dead guy grafted on as a replacement.
Consider the idea that maybe only Earth Life naturally produces adrenaline and the rest of the Galactic community treats it like a drug. Imagine having your non-human friend suggesting you go to rehab for your “problem” not realizing it’s literally a biological function?
I’ve seen stuff like Death People and Space Orcs but to be honest we’ll probably be considered more like Drugged Up Death Orcs.