To me it me it means that unless you've had several standout performances this season, you probably should be subject to some rotation.
Look at the rest of the backline - this year alone we've had multiple 13s, multiple 11s, multiple 14s, multiple 10s, and multiple 9s. Which is about right for a team that's really quite shit. It's understandable that Folau is above rotation but To'omua? Not really, no.
It's the same kind of attitude thAt had people bolting on AAC (Adam Ashley-Cooper) at 13. There was significant resistance here to the prospect that TK could make that position his own - he's been best on ground every test since, pretty much.