Cressida and SisX, have you read at all about "white feminism" -- i.e. the tendency of white feminists to think about the issues that impact *us* without considering issues that impact black women, disabled women, etc?
Like, when people say "women got the right to vote in 1920," well, nope, that's not even remotely true. White women were able to vote starting in 1920. Black women in Southern states didn't get to exercise that right until the Civil Rights movement. In this way, the experiences of black women have been erased from the feminist movement for a long time.
I see where you are coming from, but do you really think that intersectionality is about women deferring to other groups? I guess it's possible to read it that way, but I don't think that's what is intended or even really what is happening. I see it more as an understanding that all women are impacted by many issues, and the oppression that women suffer based on their gender is often multiplied by race, disability, poverty, etc. If any march for women didn't consider those issues, then there would be a lot of women who'd be left out.
It kind of reminds me of, just after the election, when a bunch of (mostly white dude) liberals were calling for an end to "identity politics" because they are "divisive." But if you look at the liberal platform, and you start taking out planks that apply to the various groups in our culture -- take out disability rights, take out reproductive health, take out Black Lives Matter, etc etc -- then you end up with a platform that is made up exclusively of things that
everyone white dudes care about.
It's an example of the centering of white dude perspective that takes place every moment of every day in our culture. The white male perspective is the "default" one, it's the one that is meant when people say "issues that everybody cares about," and the rest of us are just "special interest groups."
My guess is that the organizers of this march are trying to avoid that happening to their platform. They don't want to center on only the issues that impact middle class white women. They want to include the concerns of *all* women, which means explicitly including disabled women, women of color, poor women, etc.