The people wearing these things are probably not at any risk, but producing these chemicals means that they eventually end up in nature, which means in ground water, farmland, etc.

These flourinated organics don't break down in nature, they are known as 'forever chemicals'. They just stick around and get concentrated as they climb up the food chain. Like dioxins, the best way to get rid of them is burning them at sufficiently high temperatures, which apparently not all industrial incinerators reach.

I guess if enough of this stuff is pumped into the environment eventually some fungus or something will learn how to decompose it, but there will be a lot of cancer case before we get there.