He could, but it’s a long way to Sydney for a 90 minute football game and he wasn’t scheduled to do anything else whilst in Australia.
Even I didn't think he should have gone to Sydney purely on the grounds of not further increasing his already enormous carbon footprint. In my view he should have been seen watching the game at a big-screen venue here but claiming he didn't go because he couldn't have been found something to do while there is disingenuous.
He didn't go just as he didn't big-screen it here because he was well into yet another lengthy break from 'work' and didn't want to get off his bone-idle arse.