Feminism is a Spherical Argument
A spherical argument is an ecology of interwoven circular arguments that cross-reference and cross-validate each other with no reference to anything outside the conceptual space their activity generates. A spherical argument is vastly more complicated than a circular argument, which makes it vastly more difficult to refute.
A system of cultural logic may be considered a spherical argument, and a spherical argument may be considered a paradigm. So at the heart of a culture, a cultural paradigm is embedded. And to refute a cultural paradigm is as difficult as to refute any other spherical argument, if not more so.
Feminism is a spherical argument which has obtained the status of a cultural paradigm. That is what makes it so formidable.