I disagree with your opinion.
In "Fight or Flight" that is the two most known steps. But what about the five steps in between, like begging, etc, etc.
Do you how many people grew up with grandparents, parents and others telling them, "thy not kill"? That is why 25% of troops in combat are ineffective. That is why 25% of cops can not pull a trigger on a felon. Another step is negotiating with a criminal.
Their is Liquor Store clerks who had a firearm and when threaten by a robber complied* and then was executed.
*Complying is another step of the seven steps in the "Fight or Flight" Response.