I'm going to be the controversial one here and point out that despite saying they're "harmful", they've been everywhere for all these decades that a lot of other measures of quality of life have been increasing?
Most industrialized nations have average PFOA blood serum levels ranging from 2 to 8 parts per billion;[57] the highest consumer sub-population identified was in Korea—with about 60 parts per billion.[52] In Peru,[58] Vietnam,[59] and Afghanistan[60] blood serum levels have been recorded to be below one part per billion.
From https://en.wikipedia.org/wiki/Perfluorooctanoic_acid#Global_... there is this interesting quote:
Most industrialized nations have average PFOA blood serum levels ranging from 2 to 8 parts per billion;[57] the highest consumer sub-population identified was in Korea—with about 60 parts per billion.[52] In Peru,[58] Vietnam,[59] and Afghanistan[60] blood serum levels have been recorded to be below one part per billion.