At a high level of abstraction: If one runs a nuclear power plant, one does not make a practice of tolerating small oil spills. Small oil spills are almost har

At a high level of abstraction: If one runs a nuclear power plant, one does not make a practice of tolerating small oil spills. Small oil spills are almost harmless. So are small quantities of sparks. The combination of small oil spills and small quantities of sparks, however, is a severe problem and gets worse in a hurry if it compounds with certain other usually benign properties of nuclear power plants. Unfortunately, the sort of nuclear power plant operators which tolerate oil spills are often sufficiently not on their A game to tolerate sparks. This is a very handwavy explanation. In particular, God doesn't hate nuclear powerplants and try to introduce sparks into them at inopportune moments just to see if they happen to find an oil spill, but The Adversary often can and will do this to your cryptosystem.