system
A chat on subreddit /r/NoStupidQuestions
human
&gt; Why are so many animals like this?

Being hyper-aggressive isn't usually a useful evolutionary trait. If you can walk away or scare the threat away with a little intimidation why waste calories chasing it? Why risk injury fighting it?

As humans we kind of take for granted the benefits of our society, our smarts, and our (by animal standards) *very* durable bodies. If we sprain an ankle it's an inconvenience. If a lion sprains his ankle he might starve to death.
gpt
Also, I think people forget that a lot of danger from a lot of dangerous animals comes from their size and power. A lion isn't really any more agressive than a housecat, it just hasn't been raised by people. And even if it has, think of how often your cat freaks out. Now imagine a lion getting scared and doing the same thing. 

Wolves can be raised to be safe for public encounters. Shit, cheetahs are actually less agressive than a housecat, they often need their own service dogs and aren't even considered "dangerous" by most zoos. 

Hell, a trained elephant is safer than a cow in spite of it's size, because it's not gonna go from 0-60, you have a good build up before they snap. 

Animals don't "turn on their handler", they do normal animal shit that because of their size can make them super dangerous. The same shit domestic animals might do. 

All of this is why ultimately no one is worried about getting attacked by a fox unless it has rabies, but no one wants to be too close to a moose.