correlation does not equal to causation I'd insert the hand clapping emoji if I could; probably why it isn't allowed here. This isn't too dissimilar to people who eat salmon live longer despite higher mercury content detected in blood. it's not the salmon rather it's the fact that they are able to consistently able to afford salmon.
You’re making a claim about how mercury should be impacting people that eat salmon that I wouldn’t grant.
It might just be the case that salmon consumption under some threshold confers benefits that outweigh suspected detriments especially when a population tends to replace salmon with worse food.
