This this this this this. Yes, Australia has some pretty dangerous animals but only like 2 or 3 (crocodiles, sharks, maybe dingo?) of them will actually attack a human unprovoked. Snakes and spiders really don't want to bite you if they can avoid it, that's energetically-expensive venom wasted on a non-prey animal.“Everything in Australia wants to kill you.”
Um… Africa??!?!!
Last time I checked, Australia isn’t currently home to mammalian predators that can and have hunted humans, nor mammalian herbivores that can make your remains look like a GMOD ragdoll.
Box/Irukandji jellies though are a different story, but they're fairly easy to avoid. Wear a stinger suit/wetsuit, avoid swimming in marine/estuarine areas during the summer months, or just don't go swimming if you're too worried about them.