You are talking about GoreTex in the first sentence, then PFAS in general in the next, conflating the two. The EPA has absolutely found harm in humans from PFAS using science [1]. I don't know anything about GoreTex, but I do know they changed their formula to get rid of PFAS, at least for marketing reasons if not out of fear of liability as well, considering they are being sued.
[1] https://www.epa.gov/pfas/pfas-explained#:~:text=Scientific%2....