The other thing is that the truly deadly varieties, such as the subject of this article - Amanita phalloides, are really not that hard to avoid. When you're a novice forager, there are plenty of varieties that don't look remotely like Amanita, and are much easier to differentiate.
There are some hardcore foragers who even consume certain varieties of Amanita (some of which are edible!), but to me this would be too much of a hassle, since it would involve spore prints and maybe even microscopy of the spores to be absolutely sure.