This prudence should belong to the private property owners sole discretion to be compassionate or not. Just like it is for an officer of the law. On his own private property he IS the law period. Even law enforcement has great restrictions against authority on private property. Yet law enforcement can shoot a trespasser on someone else’s private property at their discretion but the owner of that private property cannot?
Nope, The weak have been slowly brainwashed into giving up our own legal private property rights...
Society determines law and who will enforce it. Not the individual property owner. You can no more shoot somebody on your property without a threat than you could commit other crimes (rape, assault) just because you are on your property. You need to go back and rethink your thesis.