Probably never, because they do ?
A won offensive draw is the difference between starting the offensive zone play, setting up that shot, versus hustling back to the defensive zone because the opponent is counterattacking at full speed.
A won defensive draw is the difference between controlling the play and making that breakout pass versus hoping that whatever defenseman we have on point is fast enough while channeling his inner Girardi to step in front of that cannon that is about to be unleashed.
But yeah, they mean nothing