Ya. Feminism shouldn't be necessary. It should be obvious.
I would like to add that many women during the Suffragist era opposed the right to vote. Many women in modern times - from Phyllis "Machine Gun" Schlafly to Michelle "Crazy Eyes" Bachmann have actively crusaded against their own self-interests.
I would only disagree about the specific use of "their own self-interest." I think they have built up their careers on trampling other women. Their own self-interest is well taken care of. They are Serena Joy from The Handmaid's Tale.
Yes. I meant to say it's a paradox, but couldn't think of how to articulate it. :P