It does in the context of places, like those mentioned above, with naturally elevated levels of background radiation. The absence of studies out of these areas with links to harmful health effects is evidence that such levels are likely safe.
Again, absence of evidence does not mean much. Nobody is expecting the workers to fall down after minutes of work there, the effects of low level radiation are subtle but given the known mechanism or damage there is no basis for calling such levels safe. Workers working with radioactive tailings may suffer harmful long-term effects. But it is hard to causally connect old age health issues with presence in these areas decades ago. You cannot conclude "likely safe" from absence of information or because the workers seem fine. You would have to do the studies, which as you say, probably were not made.
> The absence of studies out of these areas with links to harmful health effects is evidence that such levels are likely safe.
That's such an odd wording, making it sound like there's only an absence of studies showing harmful health effects. When in actuality there's an absence of studies, period.
That's why the commentary about the German KiKK study suggests also conducting such studies in the US. If those were already a thing, then there'd be no reason to suggest conducting them?
It does in the context of places, like those mentioned above, with naturally elevated levels of background radiation. The absence of studies out of these areas with links to harmful health effects is evidence that such levels are likely safe.