I don't get the point. It's quite reasonable to treat a pervasive, small risk differently from a rare, large risk. You're far more likely to die from sunlight than from botulism, but we treat the latter far more carefully. That's only to be expected, since the risk from exposure is far higher for botulism.

What I'm pointing out is different behavior when dealing with substances that have similar risks. If I had a basement, I'd much prefer to have naturally occurring radon in it than either high-level nuclear waste or toxic chemical waste, if somehow that was my choice.