Yes, it'd be much clearer to expand the question to a simple “Does the person have a religion?” before asking which one.
“[Michael Dove, chair of the Census21 Group, told Crikey that] the current question on the [#AustralianCensus, “What is the person's religion?”] leads many people to talk about their cultural background rather than what religion they align with.
“It was in the interests of bishops and the church that the “cultural Catholics get counted so the Catholic Church can overstate its relevance, and continue to enjoy the privileged funding, policy, and media access benefits”, he said.
““There’s an awful lot of religious privilege that flows from the census stage and that needs to be changed.””