Use of lethal force should be a very last resort. Every other reasonable escape should be necessary. No state requires a person to place themselves in jeopardy when deciding to defend themselves using lethal force. Stand your ground laws can give people the wrong idea about last resorts.
With the authority to own weapons comes a greater responsibility for their use. This includes the responsibility not to allow situations to escalate and the responsibilty to de-escalate. Ego and pride should not enter into the decision. In some past instances, I am not sure that ego/pride did not play a part.
Existing self-defense laws in states that do not have a "stand your ground" clause, address this reasonably.
As I have posted before, anyone owning a gun for self-defense needs to read "In the Gravest Extreme" by Massad F. Ayoob It is an eye opening book on the realities of self-defense with firearms.