I never meant that de-escalation efforts should not be undertaken, or cannot be successful. Most karate masters adhere to the concept of using force only as a last resort. But if an aggressor cannot be persuaded to de-escalate and is just wanting to punch somebody - he most likely will not be dissuaded by one's stance. (although there is the old story of the tea master who faced down a Samurai swordsman.) I have not been in hundreds of confrontations, but from the few I've been in or witnessed, most have involved pig-headed aggressors who really wanted to fight.
Your stance can absolutely make a difference. If I'm being confronted, and I drop into an aggressive stance and bring up my fists, do you think that helps or hinders my efforts at deescalation?