Most shootings occur under 7 yards so I have read. You don't even need sights ot hit a body size target at that range.
What you're basically saying is most people should not own a gun until they get proper training? As most people that own a gun don't/can't shoot to POA such as my wife.
In that line of thinking, then whats the dif if the sights are properly centered and he jerks it a little left, if he needs to shoot to defend his life?