If a player has just started recently ( say WOTLK and above) the grind to get Justicar is insane. For Vanilla players there was a time you could turn in commendations for points, which helped, but that was only for a small amount of time.
Heck, I am a vanilla player and was exalted with AB / AV in 2005 or something, and got 17k / 21k of WSG rep way back when. I stopped PVP'ing since Vanilla until late Cata and FINALLY finished up my WSG rep and got Justicar this Summer (2012), 7 years later. Now I could have got it much sooner than that had I continued to PVP in all expansions, but I would never want to have to grind that again for any character.