which is why I'm confused by people second questioning how bad it actually is in context of _fixing_ it (not in context of a national health scope)
if there is something which is known to be quite unhealthy in a non small degree, and there is a cheap fix why wouldn't you just fix it. In the end if it's very bad, or slightly less bad or the 10th leading cause instead or whatever doesn't matter, fixing it is affordable and it's guaranteed dangerous on long term exposure so you do it.
In my state, the state forces some of these tests (e.g., smoke detector) as part of the sales process so at least there is some hook for testing.
I'm not saying it's not worth it -- that's the point, I don't know -- but I agree with people upthread that it would be nice to have better information with which to make decisions.
Since around 2000, it's been part of building regulations that you gotta build air-gapped foundations in family homes. Those who can measure radon gas are adviced to buy things to fight it, and you can reduce it to basically 0% for little money.
I never really considered it from an advertisement perspective as it's adviced by our government and non-profit NGO's. So there is that, if that helps you.