Issue with that is finding mentally healthy volunteers that won’t be traumatized by being the executioner. Even in cases where they used multiple executioners, with one of them randomly and blindly using a dummy round for plausible deniability, it scars them.

Imagine finding out years later that you participated in the firing squad for an innocent convict. What would that do to you? Would the 1 in 7 chance you technically didn’t kill the person be enough to assuage your guilt?