I feel like the point of the original statement was that finding and eating shrooms in the woods is a good way to die of poisoning.
That's what I got out of it anyway
That wasn't what I meant. Although I see how you can read it like that.
My point is just that, provided you know what you're doing, you can find mushrooms out there. Save yourself the $20.
You could always go gathering, then dry them out, then use them later if your goal was specifically to have them while walking through the forest, as Nick suggested.
At any rate, I don't advise anyone goes out and just wildly picks mushrooms and consumes them without knowing what they're doing.
You're not too likely to die from it (there's not as many lethal mushrooms as you'd think), but you can get very very sick.