Because it prevents them from using it. Currently, progressives and assorted Marxists use the term to disguise their motives, hiding their plans for cultural reformation behind the notion that they are pro-woman and causing massive societal damage in the process. The muddiness of the term helps them do this. If we clarify the term so that it is actually pro-woman — if we “occupy feminism” as slmgoldberg has phrased it — then they can no longer run their hide the motive trick and we can prevent or rectify much of the damage.