I trust that my carry pistol is mechanically accurate enough to make a long shot. I even practice at a variety of distances. However, I do not practice at longer ranges with the anticipation that I might need to shoot at those distances in defense of myself or others.
I carry a firearm to protect myself, and situationally, those that are with me(family/friends). My line of thinking is that as the distance to the threat increases the threat to me decreases, and more importantly as distance increases, the number of options to keep myself and others(family/friends) safe also increases, particularly those options that do not involve use of force.