So, a cop is not personally responsible for things he does ? You or I are, but cops are not ?
My logic is flawless. You are the one saying a person who puts on a costume and wears a gun and a badge can magically become exempt for doing the exact same actions which would be wrong for you or I to do.
Thugs are people who harm people who aren't harming others, in other words thugs employ OFFENSIVE force as a means. You also admitted that most cops know many of the laws they enforce are bogus, so that makes them obedient mercenary cowards too afraid to do the right thing.
So if I "saved many more lives than I harmed", I could get away with strangling, cooking and eating say every tenth person I randomly met on a street and my being helpful to the other 9 people would make me okay?