It's absolutely worth it. One can drastically decrease exposure if they limit the main routes like carpets, furniture and food packaging. The blood level of PFAS matters even if we're all PFAS brothers and sisters.
I think it is. The more awareness people have, the more solutions we'll have to work around this global fuck up we've inherited. Use glass, foil, or PFAS-free silicone food containers. Get a water filter that removes PFAS. Buy different cookware without PFAS.
The idea is to avoid exposure where possible. Currently it's impossible to avoid it entirely and this has probably been the case for years. Hopefully we can have produce and products that don't have it in the future.
They won't stay everywhere. They're very durable, but nothing is permanent. And there are currently processes in development to break them down.
And your body will eliminate them naturally, though it takes a long time. Meanwhile, you can reduce your PFAS exposure to slow or stop any increase of accumulation.