Regardless of how they screwed up, the PFOAS should not be banned. They should be restricted to uses that require the material for national defense and for technology development. There’s stuff that PFOAS can do that not much else can. For example cooking utensils are a dumb use, but components for machines that make cars or solar panels. For example capacitors need the material because it has a high voltage breakdown. Smart uses, not stupid wasteful and polluting uses.