In my own experience as a golfer and as a golf Marshall particularly I see a fair deal of pain and distress amongst golfers which eats away at concentration and ultimate joy of the game. I see now very clearly how pain and distress gnaws away at enjoyment. It can go so deep as to create self-loathing. As I say the last shot is in the past. If you can adopt that attitude that you can’t change that shot you are practicing acceptance. I am not sure if it will improve the technical in your game but hopefully it will improve your enjoyment of your golf game. You might want to call this “living in the moment”.
Pain and distress are part of life and they can’t be entirely removed or avoided. A person who can’t accept this will find themselves in more pain and suffering. Learning how to accept distress, anger and pain is not simply a golfing skill but a life skill.