Well, if you want to be pedantic (of course you do), heat isn't radiation. Black body radiation is a consequence of heat. And in point of fact the ionizing spectral components of the Sun's radiation generates over seventy-thousand cases of cancer in the US annually, and over ten thousand deaths. If there were an artificial radiation source that was that harmful we'd be right to be very concerned about it, that's substantially more than 3x the number of people who perished in 9/11 every single year.
The real issue here isn't people using linguistic short hand like "radiation" that Internet trolls can play "gotcha" with; it's people not understanding the difference between radiation per se, ionizing radiation, and radioactive fallout. Maybe you don't need to be a Nobel Prize-winning physicist to run the DoE, but you should at least be able to explain the difference between these things. And you'd certainly want anyone working in government to know the difference between preventable and non-preventable deaths.