There are a lot of things that people in the security community (and elsewhere) don't think ordinary folks need to know. The thing is, the amount our civilization is enriched by people knowing things they technically don't need to know is beyond measure. Without it, we might find ourselves back in the dark ages.
While it's true that you can often just add more and more protection in whatever it is you're doing, there comes a point at which you need to ask yourself if maybe the best protection is to reconsider what you're doing in the first place.
Thanks to @thegrugq for tweeting this picture of what looks like a full-body condom. I imagine it's actually some kind of natural coloured latex suit, though I'm not clear on how that's different from a full-body condom.