Last I saw Australia still has millions of guns.
It's no doubt something you would need to do to have a totalitarian government take over the US, but it's not really a step required for most other countries. There' aren't many countries that could raise a militia capable of overthrowing a military backed government just from it's citizens.
For instance in NSW (the state that Sydney is in) - the NSW Police have a list of Genuine Reasons to own a firearm[1].
There's also other criteria you need to meet.
It means that day to day, as a general rule the only people you might encounter with a firearm are police officers. That is, unless you work in a rural area or in one of those related industries.
[1] https://portal.police.nsw.gov.au/s/article/Firearms-Licensin...