You might be mixing my blog with another - https://ecodietitians.com.au/2017/11/23/bringing-in-the-guidelines-the-story-so-far/ … Mine says: started with a group of well-meaning statements, the evidence came second - but the evidence (the research questions) were based on those GL....so that's the first thing: evidence-self-perpetuating
The level of evidence for tobacco-related harms is never above Grade C (perhaps Grade B in some very specific cases), because you cannot run an RCT on cigarette smoking. Similarly with mesothelioma and seatbelts
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So if you reject all Grade C evidence, which is, I would argue, a methodologically unsound method of evidence appraisal, you should similarly be demanding furiously the RCT evidence that cigarettes cause harm and that asbestos is bad
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Is the evidence for cigs causation or association?
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