I'll try to explain, but it's more of a do-or-do-not thing. When something sad happens that I caused, or I'm feeling bad about myself, I use it as a form of penance; I do a task that I don't like doing when I've violated my moral laws to pay the emotional court a fine and serve my sentence (my stolen goods would be forfeit).
When something sad happens externally, like the several recent deaths of loved ones, busy work is a shallow distraction that helps give time to internalize an issue. I was raised by a dad who would punish outbursts of emotion, so I learned to let steam off in a fizz. It doesn't make me immediately feel "better," per se, but it gives me time to stop feeling sad without acknowledging it.