I do not have rock salt loads. If I shoot someone my goal is not to hurt them. No, that is not my goal at all. I would much rather not shoot anyone, however. Having been shot at and returned fire in an active combat zone was not something I enjoyed. I would take no pleasure in taking someone's life but, if I am shooting at someone my goal is certainly not to cause them pain.
My primary defensive weapon is just a Mark II in .22lr because I am more than comfortable firing more than once and will be willing to load an additional magazine if required. I really do not want to scare my neighbor's wife - she cleans my house. I also do not anticipate missing, life is not like movies where you dodge bullets. I am a fine shot because I practice regularly and maintain my skills.
Really though, it is like throwing rocks at an intruder. We have done so since age immemorial. Today we just throw rocks a little faster and a little more accurately.