It’s even worse: they differ in edibility across the globe. I’ve eaten them some times, they are mostly tasty because when they sprout in Spring it’s mostly nothing else available; cooking is extremely important (it’s more like 2 boilings really, 7 is a bit exaggerated). And worst part: apparently they also have some unwashable slow accumulating toxin that seems to cause cancer over loooong time. Well, still quite tempting, but I kind of try to keep away from this stuff - Finland is somewhat close to border where they might become too dangerous. To mess with me, they produce huge crops in my forest - that my friends are happy to take. Well then my forest also produces large amounts of Cortinarius rubellus that they also attempt to collect occasionally. I force them to wash their hands after showing and explaining to them ID - I mean, yeah, it’s safe to just touch them, it’s just if you went so far as collect them in the wild with intention to eat, I probably shouldn’t trust you to know what you are doing, which is exactly thee requirement to be able to chew and spit out a deadly mushroom with no harm to yourself.