[Closed] Manslaughter

Manslaughter, as I understand it, is basically where someone died because of your actions (or inactions), but you did not intend for that to happen.

Now, assuming that if that were to happen, living with the knowledge that they had caused the loss of a life would be enough punishment for most people. So what purpose does it serve to send people to prison for manslaughter?

Am I just a bleeding heart liberal?