Ive spent a bit of time training K9's myself.. was initially trained as a K9 handler in Canada.. and then spent additional time in Austria going through formal training programs.. and spent a couple of years handling a dog professionally as a cop (dual certified dog in patrol and explosives detection).. all between 1999-2003...
In 2009 I had over 120 dogs working in 3 different countries outside the US... doing everything from mine detection to explosive search, narcotics search, and patrol.. with 3 country kennel masters.. and a global K9 program manager and more K9 handlers than I can remember that all reported up to my office... We also funded and built a kennel and training facility here in the US and outsourced dogs, handlers and teams to other companies as a business and kept close to 80 K9's for this purpose.. All of these dogs had to meet the standards of the UN, US Department of Defense, and US Department of State (our primary customers) to be deployable... to say the people that were hands on managing this operation were K9 subject matter experts would be a substantial understatement.. (not me.. I am not a K9 expert.. Im just a guy with some marginal experience... but I was ultimately responsible for all of these people and the success of these programs)..
Not one of the people listed above would have agreed with you...
Where we are in agreement is that MOST dogs can be trained.. and that MOST of the time an owner either doesnt know what they are doing.. or doesnt care.. but.. I would venture a guess that your 99.9% figure is made up and there is nothing scientific or factual to base it on.. If there is data to substantiate this I'd love to see it.. if its a made up, exaggerated figure.... then, it is valueless..
Whether or not a dog can be trained is not the same thing as to what extent a dog can be trained (theyre all different).. and whether or not the dog has the right temperament or drive to take to the training being presented at an acceptable level... or that the trainer (whether formally or informally trained) has the capacity to actually get the dog to do what he wants him to do.. or bring an otherwise bad dog in line..
being able to get improvement out of a dog is not the same thing as being able to get a dog to have acceptable behavior... and not being able to get a dog to adhere to acceptable behavior doesnt make an owner bad..
while the vast majority of dogs can be trained to reach a simple goal as acceptable behavior.. there are some that simply can not... and all the good parenting (or training) in the world wont change that.. (also applies in children.. I can assure you there are plenty of bad people out there that had proper upbringing, training, and all the opportunity in the world presented to them as children.. but simply made the conscious decision not to be good people.. or have mental incapacity.. emotional disorders.. etc..)...
If in fact there are examples of good parenting that has an end result of bad children... are you saying the same can not (or is not) the same with dogs?
Do you really believe that 100% of the time when there is a bad person.. that its because there was a bad parent involved? there are no other factors potentially in play?
And that this further applies to dogs? that nothing else impacts or influences a dogs behavior other than training and the single exception you acknowledge (trauma).. that mental capacity, mental stability, drive, temperment, pains, discomfort, personality (or a multitude of other things) have no influence on a dogs behavior? and that every one of those factors is correctable through training, 100% of the time?