Actually gathering mushrooms is not about the taste. It’s about the process. Like hunt, but without killing any animal, or like fishing but without killing any fish. There is a nice book about this aspect of mushroom gathering, The Third Hunt by Vladimir Soloukhin:
I agree with the thread-starter that some actions look incredibly stupid, like an attempt to eat something similar to Amanita (indeed, no taste is worth the risk) or the belief that there any no deadly mushrooms in any given place on the planet. Exclusion first - as kids we were allowed to touch Boletuses only, and then some distinct non-boletuses that have no poisonous lookalikes.
But the described actions are not actually stupidity if you think about it. It’s an attempt to do something that can be done safely only if you are immersed in a culture that preserve and cherish knowledge on this subject and promotes safe indulgement in related pleasures.
We can respect all cultures, probably. But to gather and eat mushrooms safely you should follow (not necessarily) a culture you have grown up in but culture of people or groups who know how to do it safely.
Depends. Certain varieties like penny bun can taste superb, and in most areas you're extremely unlikely to confuse them with anything poisonous or even inedible.
There's no risk to eating many carefully foraged mushrooms. Many of them have no toxic lookalikes, or are so easily distinguished that the risk is essentially zero.
It's not like they're chocolate.