[revolvingocelot]

Why would it not be relevant? Naturally-occurring materials have a much better chance of being biologically uncontroversial when introduced to the human organism -- not that eg cyanogenic glycosides, which can kill you, don't exist in apricots, but some levels of those dangerous compounds can be processed because they've been a component of the natural world for evolutionary time. The idea that modern science, let alone modern-science-as-influenced-by-capitalism, can't properly perceive the consequences of artificial compounds is what TFA is about, and if TFA isn't convincing I invite you to consider PFAS, BPA, or leaded gasoline.