What "I" want private citizens to do is limit the use of deadly force the the means necessary to remove themselves or others from the threat of immediate harm. In this case the act of brandishing a firearm succeeded in accomplishing that goal. It needed not go further than that.
Don't even think to presume you can speak for what I want or what my actions would be.
So you want duty to retreat?
Thankfully most states don't share this warped view where it is the victims responsibility to flee and as soon as somebody is in ones home unlawfully the home owner can shoot without regards to retreating or asking if criminal is just there to rape or rape and kill before deciding if deadly force is necessary.
