I.e they shouldn't be blamed if politicans force them to fight battles they think are unjust. If they are ordered to they don't have a choice its fight or go to miltary prison per UCMJ. Other jobs (law enforcement) are not like that. Generally speaking its quite unfair to double blame soldiers forcing them to fight unjust wars and than punish them for being forced into stupid wars. They can choose to not be soldiers but not everyone will be in a position economically to ignore the possible benefits. Miltary service is a strong path to escape poverty especially in the US.
Law enforcement is entirely different they are immune to judgement errors they make even if they kill someone. They have little accountablity, and often abuse of the law is just overlooked or covered up because they are the ones who enforce it. They don't even have to know how to do their job or law, if they mess up its someone elses problem due to qualifed immunity. Hence the craziness with the ICE they can violate rights with impunity and much of that has to due with the fact their oversight body is apparently just the president who says don't care about any law breaking.
Adding to this, if you're in the peacetime military and have a long contract, and congress or the executive orders the military to deploy somewhere, those soldiers won't even have much of a choice. As long as you're under contract, if the military says jump, most often all you can respond with is "how high?"