Except the AA selectors are clueless flogs who get it wrong every single year.
They do get it wrong sometimes, but overall they are far more accurate than the umpires deciding the Brownlow and even the coaches deciding the coaches award or whatever it is called.
The All Australian is the best award when it comes to accuracy, selecting players who are not midfielders and also determining who are the best players for said positions in a given season. Yes there are mistakes, and they try and push too many midfielders into the side, but it is the award I trust the most given it is basically the only subjective award that isn't just a midfielders award.