> Therefore the very fact that they asked you to hand over your wallet is evidence that they will not shoot so long as you comply with their wishes

Oh please, you only need to turn on the TV to see security camera footage of convenience store employees being shot AFTER opening the cash register. It happens because, in their mind, criminals don't think they'll get caught. How many examples shall I provide... let's start with the 1991 Austin yogurt shop murders and go from there.