Idea of ‘sex-based oppression’ with scare quotes. Marvellous stuff 
I don't think Dworkin has a lot to answer for. She died 13 years ago and the quote is 44 years old. Things change.
Simone de Beauvoir also doesn't have a lot to answer for, for writing 'One is not born, but rather becomes, a woman' almost 70 years ago.
Both are used completely out of context as a kind of 'gotcha' by people with an agenda who have rarely read any further than their cherry-picked quote.