"My niggles are manageable," he said. "They definitely won't hinder me going into next season so I had no decision to make. I was always going to come along to have the honour of playing for the Kiwis.
"To be honest, I'm not as bad as I thought I would be. It has been a long season but it has been an enjoyable one. The body is still holding together nicely."
Coach Stephen Kearney went to bat for the notable Warriors absentees, saying Johnson's back injury had become an issue late in the season, and Vatuvei clearly would benefit from the break.
"I'd like to see Shaun in a Kiwi jumper for the next 10 or 12 years," Kearney said. "We don't want to take any risks with a guy like that and I don't think the club does either. I don't have any issue with that. And Manu has had a tough year. He had a bad knee injury right at the beginning, a broken arm at the back end and wrist problems also."
Kangaroos coach Tim Sheens was remarkably frank, admitting Australia weren't blameless when it came to questionable withdrawals.
"There are a couple of players who chose not to play for various reasons, so I don't think we are clean skins in that area," Sheens said.
While he didn't name names, Manly skipper Jamie Lyon is often unavailable for rep duty, while Knights star Kurt Gidley is not believed to be at death's door despite being an injury withdrawal.
So if it comes down to who cares wins, maybe it will be a draw.