This is a completely disingenuous take on the case. There isn't a single explanation of how its dangerous only thats its found in many different species and claims its toxic. If this shallow type of analysis is enough for otherwise technical people on this forum then we have a much bigger problem than 3M.
People really want to believe these companies are Disney super villains. No evidence required. And no accounting for all the benefits that derive from these chemicals. Americans are really bad at risk assessment and toxicology. I suspect it will be our ultimate undoing when the Chinese come along with superior weapons that withstand higher heat thresholds or less corrosion.