Manchester United was used as an example by Invers of a team that uses squad rotation. They can afford to rotate some of their players and not lose much but their match winners are not so easily replaced. The big difference is in other team sports that match winner can still come of the bench and affect the game.
IMO Australia doesn't have the players to be randomly resting them and indulging in someones pet squad idea. I'm ok with being careful with the young bowlers but it really shouldn't go outside that.