Imagine you were stripped down, forced to inhale a gas that made you throw up until you die, get butchered until you're basically a container of this liquid. This manga is interpreted down to a smaller size and the art is cuter, but just imagine these mushrooms characters as humans.
Good that they added psycho poison mushrooms, cause otherwise it would have been edible bad poison good kind of story.
Now it makes world more complex since now it's not a type that determines alignment but an individual.