I think part of what the author sees as problematic is the loose definition of what "natural" means - to use your herbalism example, some people consider herbs

I think part of what the author sees as problematic is the loose definition of what "natural" means - to use your herbalism example, some people consider herbs to be automatically better than {mainstream_treatment_x} just because it is "natural", for a random value of "natural". So you are probably saying the same / a similar thing as the author with slightly different emphasis. edit: grammar, spelling mistakes, mainstream_treatment_x instead of "better tested"