[major re-write to remove scientific assertions disguised as opinions]
Jennifer Mitol wrote: " So until we have more studies that tell us otherwise, why in the world would you risk it?"
In my case the answer is emotional: pure unadulterated joy. Rockwell's piece sent me back to my youth when I first fell in love with moving through nature, watching, learning, observing, sensing, and participating directly. Getting back into camping as an adult, suddenly there was a new bug and almost all of my college educated brainpower went into evaluating that. The joy I felt, unleashed by Rockwell, bending over to drink freely from a mossy springlet so presenting with the signs I'd learned how to identify clean water in the wild, is inexpressible. The joy of being a member and not engineer of nature.
But I feel I can say that from a position of informed, if not decimal-self-quantified, risk avoidance. I've read literature without reviewing as a peer. I merely believe/suspect that PPM and not single-cyst is material. Identifying bias and re-interpreting seems half the battle in learning from objective studies themselves.