I'm sorry, but that is a huge crock of horseshit with absolutely nothing to back it up but vibes. That's like saying the abolitionist movement achieved nothing because it is superceded by a broader class struggle against capitalism.
Women fought for and won the the right to self determination, the right to vote, the right to divorce, the right to bodily autonomy, the right to be legally treated as persons instead of as the property of their husbands, etc, and none of that is diminished by its byproduct of a larger workforce being better for capitalists. "Women haven't won anything" fuck outta here