If I pull the trigger I will have shirt buttons in my sights.
i too have mixed feelings. if this means it’s leagl to show a person you are armed so as to defuse the situation (as in pulling your coat back and putting your hand on your holstered weapon i’m for it. once the weapon leaves the holster the only shot is to the body. warming shots are dangerous and a lawyer can argue “if you had time for a warning shot, you weren’t in a life threatening position.”
if you are willing to draw you have to be willing to shoot and possibly kill. if you haven’t given that serious thought, you shouldn’t carry.