That's a weird way too see things. You are pretty much saying that wearing a bulletproof vest won't save you from the bullet, but laws forbidding to kill people somehow magically will. Well, I suppose you also could literally say that and I kinda can see where are you coming from, but I think it's somewhat delusional.

Proper law enforcement (mind the "enforcement" part) can make a neighborhood safe enough so that nobody tries to shoot you and you won't need to wear vests. But in the end of the day, if you are messing with bad people in the bad neighborhood: bulletproof vests are real, laws are not.

And when you are talking about government enforcing the laws that are supposed to forbid uncontrollable government agencies to do what they do: well, government kinda is bad people in the bad neighborhood.