You seem to be conflating the effects of chemicals previously used in the manufacture of Teflon, such as PFOA which is indeed very dangerous and toxic, and has been banned in the US, with Teflon itself, which appears to be safe.

I mean, if Teflon is so toxic, and there isn't a single person alive today who doesn't have Teflon in their blood, then why aren't there tons of documented cases of Teflon poisoning?