I think that if you start from the belief that radon mitigation is sold based on fear, and doesn't have value, then it's easy to cling to that belief and try to dismiss or explain away or minimize information that contradicts it, and to dismiss people who see value in it as 'fear buyers' who believe in a 'bogeyman' and say 'good idea' to things which, in your opinion, might not be good ideas.

A perspective perhaps different from yours: Avoidable cancer risk isn't great, and smart people* properly weighing the facts have repeatedly judged the value of radon mitigation to exceed the costs.

* - Probabilistically speaking, this includes many who are smarter than you and me