And you are presumably one of a number of posters who get upset by and jump on anything vaguely negative so we end up with a lack of debate and rival echo chambers with each other on ignore.
Addressing the point not the poster, 91 lead on a first innings is generally not enough to offset the disadvantage of batting fourth, unless its an overall low scoring wicket. Factor in they have Smith at the crease and our best bowler is injured, yes its advantage Australia, unless we pull something special out of the bag.
I stand by anything over 300 and they have won the game. Below that and we will win.