Why can't RBs throw it away?

I think the penalties forced us into that play. Instead of first and goal from the 7 it was first and goal from the 17.

I didn't have a problem with the play until I watched the Colts game. When I saw Addai throw the ball all I could think is why would they have Addai throwing the ball when they have Peyton Manning. Then I thought Brees is a damn good QB too. Why would we have Bush throwing the ball when we have Brees.

That play might work great someday but not when Bush has negative rushing yards. If the defense couldn't stop him then I could certainly see the play working.