I think WW can be supportive of BW if we are prepared to put defensiveness aside and just LISTEN.
I’m white and reasonably well educated, comfortable financially. I will be listened to, I have some social standing. I have the ear of white men to a degree as I’m more likely to be married to one and I definitely have white male relatives. As a mother I have far more influence than my DH over what my daughter thinks, watches and consumes, her toys and books because I’m more likely to be the primary carer. In fact I choose ALL her books and toys so for instance there ARE things you can do (buy fromBME female owned business, buy dolls/toys that aren’t pandering to the Euro centric beauty ideal, buy books which feature BME girls as the main character...)
So to me it is using what advantages we do have.