You didn't read (or didn't comprehend) the article. Apple's position as given in the white paper is that Apple bands containing PFAS are safe to wear for users, but that producing and distributing products containing PFAS has harmful effects. This can be, for example, to the environment near production sites. If I'm not mistaken, PFAS are common in things like nonstick pans, where they are extremely stable and unlikely to cause harm under ideal conditions. But in that case, extended or repeated exposure to high heat can denature the pan or scratches can result in PFAS leaching into food. My point is just that it seems reasonable that PFAS in, say, the Sport Band, are exceptionally unlikely to be exposed to the conditions that would make it harmful to users. Although environmentally safer alternatives should of course be used if they exist or can be engineered.