I think my takeaway from the "there's heavy metal in basically all dark chocolate" is less: avoid dark chocolate

and more: we live in an impossibly polluted era, you can't avoid this. SPINACH is a concentrator of heavy metal, they're in the air and soil, this is a growing problem not a processing impurity. So just eat food and accept history will view us as polluted bumpkins like the Romans. https://www.cbsnews.com/news/dark-chocolate-metals-lead-consumer-reports-hersheys-trader-joes-cadmium/