"Dogs are not our complete life but they do make our life complete." --Unknown
This doesn't apply to everyone and to try to force this upon a non-dog owner is disrespectful at best. I know plenty of people who don't own dogs but consider themselves "complete".
Some people just can't make the cut, as a good owner.
Some people CHOOSE not to be a dog owner because they UNDERSTAND their limitations. This shows as much respect and love for the animal as a self-proclaimed "dog person". To insinuate a non-dog lover is less of a person is insulting and offensive. This is coming from someone who considers herself a dogaholic. We should be commending and not condemning the OP for being selfless in his thinking. If more people would think like that, then maybe fewer dogs would wind up in rescue.