Ya, somehow we think that releasing a falsely imprisoned person after decades is fixing it. We made it right! Well, no, you took away a significant chunk of their life, and likely ruined the rest of it as well.

That doesn't mean, however, that we should give up. We should be more careful about taking away life and freedom, and we should seek to make prison more fulfilling, so that people can have fuller lives when we deem them safe to be let out (because we discovered our error, or because they were rehabilitated).