A lot of people toyed with the idea of emigrating to Australia. And a lot of Americans have found home there. But you are correct. An isolated continent has been home for some very dangerous animals. They are for the most not very big...just very poisonous. The worst are the snakes. A lot of them. And yes they do get inside homes. But there is a service that you call that will capture the snakes.
The other aspect that is unpleasant believe it or not is the internet. For some reason it is difficult for them to "hold" the internet. It is often down. And when it does, it only emphasises how isolated Australia. Very isolated. Even New Zealand is some distance. They have the same problem as Australia including the feeling of isolation. Still it's a big improvement over what it used to be. For many years, Australia had a very small population. It's more then tripled but that has bought more problems with land. Only a small part of Australia (the entire coast) is habitable. The further you move inland, the hotter it gets. Even the original aborigines could only live on the coast. So a good part of Australia is uninhabitable. As a result very few people can own a lot of land. Also it's the dryest continent on earth. Not a lot of water. I was shocked to read of a famous Australian actor that put his house up for sale. It was the size of an apartment in the U.S. looked like a row house and it sold for millions. Other then that, it's a good place to live. Starting in the 1960's quite a few American left the U.S. to start living in Australia. I think for the most part, they have not regretted it. It does get very hot and humid there. There is a so called paradise strip of land there where Adaliade is. The southern coast. It's dryer and very much like California. Only other place that offers "paradise" Like California, they have earthquakes and fires. Fires are a more dangerous threat and people have died trying to flee the fires.
There a lot of nice places to live around the world. But they sitll have problems just living there.