There is a big difference between ISPs voluntarily submitting to a filtering regime and being mandated to do so. The Government cannot provide a single example of a Western democracy that mandates a compulsory ISP-level filter.
It has also failed to provide a single example of a Western democracy that attempts to censor adult-themed games or politically contentious material about subjects such as euthanasia. Yet such material falls under the current RC-classification guidelines and thus would be subject to blocking by the mandatory filter.
No mention is made of all the other Western democracies that have neither a mandatory nor voluntary ISP filtering regime yet still seem to function without societal collapse.
Does the Australian government truly think that Australian citizens are unique amongst all citizens of Western democracies in needing a mandatory ISP filter to prevent access to RC-content? What kind of people do they think we are?
If the Government wants to provide an example of a regime that does mandate technical censorship of online content it has to look beyond comfortable Western democracies and seek the embrace of countries such as Iran, Saudi Arabia and China.