Begs the Question, is the NRL the Toughest most Punishing team sport there is? Guys like Ennis/Smith/Maloney/Gal not really big sized guys, unbelievable their longevity.
Well... Maloney didn't become an NRL player until 24, and I wouldn't put Gal in the same class as the others. He's much bigger than those other 3 guys, and superhuman.
Late last year I heard Brandon Smith on the radio. He said the biggest reason for moving to the Roosters was to play hooker full time, and the biggest reason he wants to play hooker is because playing as a running forward is much, much harder on his body. He says that he thinks he will be able to play for much longer, and be able to play more games per season, at hooker.
So yeah... while they make a lot of tackles, hookers, halves and fullbacks don't get bashed as often as everyone else.
It's also really funny that the two hookers you listed are 1) the best one ever, and 2) the most successful Sharks one ever. They are two blokes who almost never ran the ball... and in spite of this, the peanut gallery thinks our current hooker is no good because "he doesn't run enough".