The trouble with these scare stories about nearly losing an arm etc is that they have no specific relation to the spider or insect. Some people have an extreme reaction to a sting or bite (and other things: peanuts, for example). If someone died, or nearly died, from a bee or wasp sting, we would not be hearing that we should avoid bees and wasps because they are deadly! There's no particular reason to fear this spider. If it really was dangerous, we'd be treating it like Australians treat funnel web spiders: public health warnings, pest controllers employed, anti-venoms stocked and so on.