northernmastiff, I don't think I am aiming to force a breed to change.
If you read through everything that you wrote, that is exactly what you are saying.
Mike, I know you are playing devil's advocate but those are the exceptions not the rule when it comes to the hard breeds. I would be the first to say that if you could improve the reputation of a breed, by all means do so but I think the OP knows very little about dogs and should spend more time researching what has gone into a breed. Some breeds have hundreds, if not thousands, of years of breeding that has made them what they are. An ideal, however noble, is not going to change that overnight. It will take generations of properly planned breeding to reverse what has already been done and not just training. It's like taking a Siberian Husky and saying, "Well, you aren't going to run...you are going to be a pretty little lap dog and nothing else." That won't last and the first time you turn your back, that Siberian Husky will be up over the fence and off running, no matter how well trained he is. They were developed for work, to run and pull, that is what they are going to go back to. As much as training can do, it can't control a natural instinct completely. Hence the rule to never allow your Siberian Husky off lead out of a fenced in yard no matter how well trained they are. Again, there are exceptions to the rule but those are rare.