so do huntsman spiders kill those funnel web spiders
where are the funnel web spiders not located
why does Australia have so many deadly critters compared to other places
As to a Huntsman killing a Funnel-web, it would depend on situation. A Huntsman walking past a Funnel-web hole would be ambushed and killed but one coming across a wandering Funnel-web would be much faster and could probably take it, if it was going to bother at all.
Funnel-webs are basically east coast, the most common is the Sydney variety, which is in NSW. There are similar spiders like Mouse Spiders and Trapdoor Spiders elsewhere.
Australia has deadly critters for a couple of reasons, much of it is harsh terrain, a predator has to kill fast to avoid losing prey. Marsupials have much slower metabolisms than rodents so snake venom has to be much more potent. Also it's somewhat cut off and undisturbed ecologically so primitive species like Funnelwebs could compete with modern species without massive changes in ecology occurring they couldn't deal with. All this is conjecture to be honest, it may just be bad luck.
We get Funnel-webs in the back garden, just don't let the kids out without shoes and they're rubbish climbers so as we have stairs to every entrance I don't worry too much about them getting in. They spend 90% of their time in a hole, only going out to find a mate or if they get flooded.
Here's one my son is commenting on that the neighbour found in his garden. This one went off for venom milking, you can drop them at any local public hospital.