Earlier quoted context omitted.
I don't see any mention there of the dosage at which these toxic effects occur. That would be necessary to determine if the amount found in the environment is a concern or not.
That's silly. The fact that it is toxic makes it a concern, and the fact that it is a concern means that if you're selling it you should find out yourself about the specifics. It's like saying that you're not responsible for stealing a wallet because you didn't know exactly how much was in it.
The question of responsibility is of course not what we were talking about, but rather whether the statement "PFAS were known to cause issues" was in fact true. Too often we see possibility of harm being deliberately conflated with actually causing harm. Is it too much to ask for some honesty here?