Pete, here is the wiki link concerning Australias gun laws:
https://en.wikipedia.org/wiki/Gun_laws_of_Australia#:~:text=Licence%20holders%20must%20demonstrate%20a,also%20hold%20a%20firearms%20licence.
Personally, I think in Australia we have reasonable gun laws.
My concern about free, unfettered gun ownership is mainly to do with human error, emotional stresses, mental illnesses etc. Someone may be fine one day and murderously insane the next day.
One thing to note in Australia is that, if you own a firearm, you can expect a visit by the cops twice a year, any time to make sure your gun is safe and secure. To me- this seems reasonable.
Gun ownership in Australia revolves around an individual having a genuine reason to own one, that reason cannot include self-defence. So, there has to be an interest in hunting, sport shooting, or managers/ owners of farms for anyone to consider going to the effort of purchasing, licensing a gun.
I should point out that I grew up owning guns, although, Ive never been a gun fan-boy or enthusiast, and now I dont care to own a firearm.
I believe this has more merit than feeling you have to go and buy a gun for self defence because everyone else has one and you feel scared and think its the only way to protect yourself.