The game should record TOTAL DAMAGE. Then you can have a sense of whether or not your are a useful human being, or a piece of turd.
It's not because you don't make damage that you are useless, take example of a shielder luring opponents in a trap.
Best example is in DTV, a shielder can lure all bots for 2handers to slaughter them.
Anyway, assistpoint is pointless, if you need a board to show you are usefull then you are certainly not.