Self defense is a fundamental human right, unlike say, accounting or being a model agent. If a person is too dangerous to be allowed to defend themselves, they shouldn’t be allowed out. And a drug cartel enforcer will get a gun if he wants one.
Like a lot of silly statements, your little bumper sticker slogan is meaningless.
Having a 100% either total release, or no release, is silly.
I wonder if you have closely known a lot of violent felons in your private life, they tend to have issues, including temper, and impulse issues, it is how they get convicted of felony attempts to kill and maim, and while we have to take risks to avoid holding them forever, we can try to minimize those risks, by keeping them away from conditions we think can make the risk of releasing them early, less risky, whether it is guns, freedom of association, and other things.