It's premise is that the courts can never be 100% correct. There is no level of burden of proof which is infallible.
No amount of modern technology guarantees that an innocent man won't inadvertently be convicted and sentenced to death.
https://en.wikipedia.org/wiki/List_of_exonerated_death_row_inmates
I really, really don't want this to pop off. I want there to be some other means.
I'm just having a real hard time seeing what other choice people with their backs against the wall will have.