Originally Posted by Mello2u
The scene after a defensive shooting should be considered a "fluid situation"; a situation that is subject to change in an instant without notice.
Consider that if the shooting takes place inside of a building there are a great number of places you can not clear unless you search.
If the shooting takes place outside in a parking lot there are a great number of places that a shooter could pop up or out to engage you as you look down to holster. If, if, if . . . .
Consider also that after a self defense incident there might be other reasons you will want two hands free but to also have your gun immediately available in your holster. And it can be helpful if you can get it into your holster safely but without diverting your attention from what could be more important goings on.
Just as you can not predict ahead of time how a defensive encounter will play out and what you will need to be able to do to be successful, you can not know ahead of time what you'll need to be able to do immediately afterwards. Being able to holster your gun one-handed and without looking just might come in handy.