Patrick Carrigan says the debate over the national anthem should prompt a wider discussion about Australia's history and society.
"As sports people there's a focus on us as role models but it probably points to a greater conversation for us to have as a society outside of football," Carrigan said.
Kotoni Staggs and several Kangaroos teammates have faced criticism during the World Cup for not singing Advance Australia Fair before games.
Australia will meet Samoa in Sunday's semi-final at Sydney's Allianz Stadium.
Staggs has played nine Tests since his Kangaroos debut in 2023 and says his choice reflects respect for his ancestors, elders and family.
"I'm a proud Wirajudri boy and I'm proud of who I am and where I come from and me not singing an anthem doesn't mean that I'm not grateful."
"You also talk to your elders from back home and grandparents and stuff like and (understand) what they had to go through, it's more of a respect for my elders and my family." Staggs said.
He has also said he is proud to represent Australia and that his decision does not diminish his respect for the jersey.
Criticism of Indigenous Kangaroos players, including Latrell Mitchell, is not new; former Australia Test coach Mal Meninga has previously defended their position.
Carrigan backed players' right to express their beliefs, saying the discussion could help the country understand their perspective and come together.