And often they're pitted against workers on the side of the ruling class.
Doing a bullshit job to feed your family is defensible, doing an evil job is just stupid.
Just keep in mind your argument can be/ is used to defend brown shirt and military personnel commiting war crimes. We know memetically at this point that "just following orders" is not a valid defense. We need more people to actively choose not to become cops and not to become defense contractors.
Edit: just to push against the "sand in the gears" thing. We know that a lot of military actively hate their job and just believe they're doing the bare minimum/dragging their feet to get paid. But they still get work done and add credibility to the institutions they work for.