White women vote for the interests of white men in a way that no other demographic of women does. I don't think your image of banishing others to the barn so you can sleep at the foot of the master's bed is too far off for a lot of them. To be fair, the more deeply you are embedded in that culture, the more it costs you to challenge it, but there's an awful lot of progress that could be made if all the Phyllis Shlafly Jrs. would get on board with equality.