I know you think it would help. But the accounts of most folks who have been through such things tells you that, for the most part, it actually doesn't.
Which is both hard for me (a vengeance minded guy) to grasp...but also, knowing just enough about human nature, loss, and grief, it also makes sense. We don't find actual closure and peace by trying to "balance the ledger," because such ledgers can never be balanced. To continue the metaphor, most people who speak of finding peace and closure get there because they "write off the debt." Holding onto trying to collect on a debt that can never be repaid is a recipe for continued suffering and anger. It's counter-intuitive at first, but in the bigger picture, it makes sense.
You say such things definitively -- "it would bring closure." "It sure would help." You may genuinely think that. But first, you don't know that, as you haven't actually applied that path to yourself. And second, looking to the folks who HAVE walked that path, they mostly tell us that what you think is generally not how it turns out. Maybe listen to them, the folks who have come out on the other side. They aren't speaking in the abstract or unknown like you and I are' they are speaking from actual experience. They have more credibility than you or I on the matter.