The experienced forward claimed he was content to make an impact off the bench after being omitted from the starting XI in the new coach's first match in charge
Cahill came off the bench to produce a trademark header in the 69th minute and ensure the Ange Postecoglou era started with a bang and not a whimper, and the veteran's 29th international goal also saw him draw level with Damian Mori on Australia's all-time list.
The former Everton star denied he was angry at not starting the match, willingly buying into the new coach's team-first philosophy.
"I feel you have to see the bigger picture. The boss has said the core of the players have to stick together through thick and thin," he said.
"Regardless of players not starting, it's going to be about 23 players going into this World Cup.
"If you don't want to join the ride and join the group mentality then you might as well get off now.
"It's not about one player. In the campaign I had in 2006, I played a part on the bench and through the last campaign (in 2010 it) was the same sort of scenario.
"As you get older it's more about using your experience and helping the boss."
There is no doubt Cahill is Australia's most vital commodity heading into Brazil.
He is a handful for any defence, particularly in the air, and the Socceroos' one genuine goalscorer.
Twenty-nine goals in 65 games is an astonishing strike rate.
Cahill said: "To get the record with Damian Mori is a special time. There's something there to be broken in the next few games or next World Cup.
"It's a big honour to play for your country and have records like that.
"I'm very proud."
Cahill also liked what he saw from the Socceroos following back-to-back 6-0 losses which cost ultimately cost Holger Osieck his job.
"It felt really good and was great to watch from the bench in the first half. The composure was really good on the ball and it's the start of the new reign where we're going to play a lot more football and try to press teams," Cahill said
"It was a good team performance and a great win for the boss."