Shouldn't a more honourable way out offered in contrast to a life in a 3.5 x 2 metre cell? I mean, what difference is there with being on permanent but terminal life support? No visits, no mail, no phone, no sunshine. As a prisoner, like Massaoui, faced with that wouldn't you appreciate options?
I would offer anyone who was convicted to that kind of sentence an arsenic pill or one bullet gun so for the last time in their life they can make an informed choice. No pressure, no false hopes, just certainty whatever you choose. I think that would be quite humane: allow the falsely imprisoned to continue their fight, and the guilty to end their life with whatever honour they think they have left.