Which proves what? Only ignorant fools would imagine that "swimming pool" reactors are designed to produce deadly radiation that would get past a thick layer of water, or that minuscule amounts of a mildly radioactive element would be life-threatening (though eating heavy metals is not a healthy thing to do). It's like saying that a bullet, gunpowder, and cartridge case taken separately (harmless) all disprove the idea that they could be used to kill somebody.

My father saw the ruins of Nagasaki in person, in November 1945. He didn't forget nukes, either. He saw the flash shadows of the dead on building walls. And the grease spots where they once stood. And I didn't spend 20 years of my career working to defeat them, if they were a myth.