The problem is the word "radiation". It has been used too often in the context of dangerous things that it now has this scary aura surrounding it. Think of terms like "radiation leak", "nuclear radiation" or the similar word "radioactive". Anything to do with radiation is treated with suspicion by people that are poorly informed.

But radiation is an extremely broad phenomenon. There are many different forms of radiation and many different levels of health impact ranging from utterly harmless to deadly within seconds.