The Death Penalty: Why Is It a Good Idea?

My main opposition to the death penalty is there's no system perfect enough to protect the innocent. If you're convicted of something warning the death penalty, while I disagree with that, there's a decent percentage of people who are innocent and decent could be 0.1,. But my point is this, if the process is such that you have been deemed a due process to a forfeit your life is on the crimes you've committed, why are we winning 30 years? Well, I think it comes from the idea of like, FISA courts and like, you're going to kill someone that if the government's going to kill them, they better be fucking 1000, like a hundred percent sure, not