The native inhabitants of this world are like the Fourth Scourge representing the players; anyway, they can restart after death without any loss.
Under such a premise, who wouldn't be fearless in the face of death?
As for the mental state, it can also be seen as the state of the players; in the game, they can be all sorts of crazy, like massacring cities, but in reality, they are normal people who don't even dare to kill a chicken.
This characteristic is now concentrated in the local human race. Once their Undying and Indestructible trait is eliminated, it is equivalent to directly returning to reality.
Crazy? Whether it's rationality or their gaze, they will immediately become clear.
"What happened?"
In another parallel space, a Proxy Agent looked around in confusion; just a few minutes ago, he was gasping for air under enemy targeting.