Honestly, this is pretty impressive IMO. Particularly since visa-free travel is not reciprocal. The below is just plain wrong; Australia is even less open than it appears:

Ranked 83rd out of 99, Australia is one of the least open nations. Citizens of just 34 countries can visit Australia without prior visa authorisation

Barring some niche cases (e.g. royal family, military/crew, transiting, Torres Strait Islanders), only one country's citizens can travel to Australia without prior visa authorisation; New Zealand (and even they can be refused clearance at the border). Every other foreign country needs to apply for and be granted a visa before they are permitted to board the plane. Australia has somehow managed to convince 33 countries that their ETAs and eVisitor visas are not really visas. They just happen to be permission that a person needs to obtain before they are allowed to enter a country... If only we had a word for that.

I'm honestly surprised how well the Australian passport performs considering Australia effectively has a universal visa requirement. That being said, it's also one of the most expensive passports in the world.