How dangerous is it in Australia?

I was a New Zealander and have lived in Australia many many years. I have travelled extensively in Australia and done some beautiful bush walks. Swam in the ocean and never seen a funnel web or white tailed spider. I have seen a few red back spiders and they are certainly no danger to me as they live out doors under things but leave a tangled web so I know if one is around and get the fly spray out. They come out of their little hide hole . I have only ever seen a handful of snakes and they haven't been in my way. There are dangers lurking but most people never encounter them. One would not stand next to the rivers in the tropical regions here without knowing that there are definitly no crocs in them and also one doesn't swim during the wet season in the sea in the trooics either. down South or places like the Gold Coast one always swims between the red and yellow flags as that's where the life guards watch and spotter planes go over to check for sharks. The Gold Coast has shark nets out to sea. I love australia i love the weather and the diverse nature of this wonderful land. So come on over.