The example i gave is not 'therapy'- it's part of a daily interaction with all dogs, all the time, that results in particular behaviours recurring or not recurring.
You ask why should someone go to the trouble of reshaping the behaviour of a dog who does happen to have some problems? Because they care. Because its rewarding. Because its the right thing to do. Because it gives meaning and purpose to your life. Because nobody else will. Because the dog is not a commodity for our selfish convenience. Because they can. Because it demonstrates to others that its possible and they might try it. That's off the top of my head, i may think of more reasons later..
