They sure do look like gooses though when (if) the game goes to shit like Eden Park and they then have to resort to " back to the drawing board". Personally, I'd rather they don't say anything if they can't or aren't allowed to speak from the heart.
They're really not talking it up that much though. The reality is that a player says something like:
"we think we've had a good preparation and if we play to the best of our ability we have a good chance."
and then the newspaper article ends up being headlined:
"Wallabies confident of ending Eden Park hoodoo."
they'll then reprint the quote from above but embellish around it and say that everything is going well for the Wallabies and they're confident of victory against the All Blacks.
Let's remember that if they say something equally non-committal but on the negative side, the headline of that article will be something like "Wallabies demoralised ahead of another Eden Park flogging."
There is always a significant difference between the tone of the actual quotes and then the newspaper story that follows it. The journalist is always going to want to make things more interesting than they actually were.