I don't buy that because the Saints got away with a blatant facemask against Goff on the drive before that play. That facemask might have changed the entire script because if the Rams scored a TD, the saints would have needed a TD to win.
Oh, and the Saints got away with donkey stomping Goff and another Rams player (after the play was over) which would also have resulted in 15 yard penalties.,
And........... One ref's job is to watch the QB and how could he not see Goff's head twisted by someone grabbing his facemask near the goal line?