Your post is laden with emotional and prejudicial language. You are claiming to have knowledge about the mind of the dog, something you couldn't possibly have.
There are several studies that point to the fact that dogs play differently depending on whether it is dog-human or dog-dog. The studies are long and complex but it comes to this: with humans play is cooperative and with among dogs it is competitive.
Some of the best trained dogs I've seen are protection schutzhund trained dogs and in training they always get to "win.", I'm not necessarily suggesting it is causative but I would suspect there is a correlation.