People forget that a good 5/8 doesn't score tries, they set them up for there outside men. Billy Slater and Marcus Bai have lost far more games for Melbourne by letting (very) soft tries in than Scott Hill has by throwing intercept passes. The whole team played poorly in the first half in the Cowboy's final last year (as they did in the regular season game). Somebody had to try and make things happen, Orford wasn't going to.
Like I said, I have no problem with halves making mistakes in games because it shows that they are trying things. Johns, Lockyer, Langer, Stuart, Kimmorley, Lewis, Sterling, Mortimer, Barrett (the list could go on and on) have all been guilty of throwing dodgy passes right through their careers.