'Ms Richard, despite her remote residence, almost certainly has microwave emissions from satellites and aircraft overhead sleeting through her body on a routine basis - not to mention the electromagnetic emissions from the Sun, the stars, the cosmic background and the planet Earth itself'.
As a long-term (actual*) OCD sufferer, I am acutely aware of the irrationality of my fears. But it doesn't stop me worrying myself ill anyway and / or having to cancel out the worry with ritual or getting intrusive thoughts.
Here I think is a big misunderstanding. Some sufferers of such conditions are completely aware that their fears / illness are not being caused by external sources - pointing that out further does precisely nothing, because appealing to a mind already racked with worry in *spite* of the knowing the scientific truth about their fear is shouting into a very big void.
* - actual, because it isn't what you might think it is. Best description I ever read here: