The Sheepdog metaphor essentially asserts that there are three kinds of people in the U.S.:
Sheep (the mass of unprepared, untrained and unaware prey);
Wolves (the group of criminal, deranged, and evil-doers who prey on the sheep);
Sheepdogs (the small group of dogs who live peacefully among the sheep and are generally the guardians of the flock).
Sheep normally live their entire day moving in a flock and generally have very little awareness of their world. Wolves shadow the flock, looking for the easy prey on the edge; the young, the old and the weak. These wolves normally can attack with impunity if they can avoid the flock’s ram since there is very little the ewes and lambs can do to defend themselves except run. The ram lacks fangs and claws and really can only use it’s curled horns to ram and butt predators. Even then, the ram is essentially just another sheep.
The sheepdog lives peacefully with the flock, walking on the edge, keeping a wary eye out for wolves. Sheepdogs are possessed of certain qualities like loyalty, courage, discipline, vigilance and intelligence. The sheepdog also has fangs, claws and a level of aggression that wolves have to respect.
But those are the same things that make sheep nervous. Since sheepdogs remind sheep of the wolf, many sheep would rather that the sheepdogs be defanged and declawed. Or some sheep even want them declared a threat to the flock and tagged as potential domestic terrorist threats or right-wing extremists. They even use the term “lone wolf”.
Sheepdogs can be found in the military, in law enforcement, in security and among responsible citizens. They don’t have to be men, they don’t even have to be in the brotherhood of arms. They are the ones who feel a moral obligation to protect the weak, stand up for the innocent and generally keep evil at bay.
I agreed with all you said so far, except this metaphor.
Law enforcement, military, etc, do not have more courage, discipline, intelligence, or anything else. I hope you realize people don't avoid being one of these things out of lack of courage, intelligence, discipline, loyalty, or any of that, but because their interests lie elsewhere. Become a doctor, a lawyer, a scientist, or any number of professions, then you tell me how much courage, discipline, loyalty and intelligence any law enforcement/military personnel has in comparison.
Be proud of who you are and your job (everybody should be, from businessmen to doctors, to police officers to lawyers, to marine biologists and so on), but to claim you have specific traits (discipline, intelligence, courage, etc, stated in that quote) based on your chosen job interest, is ridiculous, your job means as much as a computer science technician or someone who studies mammals for a living, which is just another job, of which every has an important role to play in keeping our society going as it is.
Keep in mind, I know you didn't "claim" to have these things over others, however you said you live your life on that metaphor, which did state it, and I just want to make that part clear and that it is false and quite silly to claim, if you were (going by the quote, I could be way off at 1:30 AM).