Similar story where I work, manufacturing a type of x ray emitting tool. Never seen anyone having problematic readings on the dosimeter badges, but when I was hired I did get told that they had only once had an incident, where one of the engineers had been for some reason repeatedly testing a prototype by directly holding the sample the x ray was firing at in his hand. Not sure what happened to him
To be fair, quacks that claim to be able to do magical stuff are still around, some do quite well well for themselves even