edit: i will add that there are plenty of people who use the military/police force as a job. the mother of a close friend of mine, for example, was the first woman on her force, and she spent almost all of her time on the force waiting to get out, and hating it, but staying because it was secure and had a good pension. i'm not going to say that the job didn't have a bad impact on her (as most jobs will), or that i rush to her with my burning anarchist questions, but she has more evidence than most about how the police are fucked up, and she's not stupid/denying it. if anarchists can have family/friends who are social workers, missionaries, scientists, etc, then we can have police/military connections too.
the cops are terrible, no doubt, but to focus on them all the ills of power, control, lethality, etc, is to let too many other jobs off the hook.